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DataKeeper Notification Icon

DataKeeper Cluster Edition Technical Documentation » User Guide » DataKeeper Notification Icon

Mirror Status Notification The DataKeeper Notification Icon is an application that will show a summary of your DataKeeper mirrors in the Windows Notification Tray. The icon displayed indicates what conditions have been detected, with the following priority. Error:…

Event Log Considerations

DataKeeper Cluster Edition Technical Documentation » Administration » Event Log Considerations

It is important that SIOS DataKeeper be able to write to the Event Log. You should ensure that the Event Log does not become full. One way to accomplish this is to set the Event Log to overwrite events as needed: Open the Event Log. Right-click on System Log…

SIOS DataKeeper Intent Log

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » SIOS DataKeeper Intent Log

SIOS DataKeeper uses an intent log (also referred to as a bitmap file) to track changes made to the source, or to target volume during times that the target is unlocked. This log is a persistent record of write requests which have not yet been committed to both…

DataKeeper Service Log On ID and Password Selection

DataKeeper Cluster Edition Technical Documentation » Configuration » DataKeeper Service Log On ID and Password Selection

During a new DataKeeper installation setup, the user will be prompted for a DataKeeper Service Log On ID and Password. The DataKeeper Service uses authenticated connections to perform volume switchovers and make mirror role changes across multiple servers. The Log On…

DataKeeper Intent Log files on AWS Ephemeral Storage

DataKeeper Cluster Edition Technical Documentation » User Guide » DataKeeper Intent Log files on AWS Ephemeral Storage

DataKeeper systems that are running on AWS instances which are configured with local instance storage (i.e. ephemeral disks) can use the instance storage to store DataKeeper intent log files (i.e. bitmap files). It is important to be sure that when using AWS ephemeral…

DataKeeper Service Log On ID and Password Selection

DataKeeper Cluster Edition Technical Documentation » DataKeeper Service Log On ID and Password Selection

During a new DataKeeper installation setup, the user will be prompted for a DataKeeper Service Log On ID and Password. The DataKeeper Service uses authenticated connections to perform volume switchovers and make mirror role changes across multiple servers. The Log On…

System Event Log – Create Mirror Failed in the GUI

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » System Event Log – Create Mirror Failed in the GUI

Error/Message Create Mirror Failed in the GUI. Description This can result if a vmms.exe program is holding on to volume and preventing SIOS DataKeeper from locking it.

WSFC 2012 File Server Resource Manager Event Log Errors

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 File Server Resource Manager Event Log Errors

Description In Windows 2012, if a File Server Role is created which uses one or more DataKeeper Volume resources and the File Server Resource Manager feature is enabled on the system, then a series of “SRMSVC” errors (ID 8228) will be received on the…

DataKeeper Troubleshooting

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting

The topics in this section contain important information about known issues and restrictions offering possible workarounds and/or solutions. ________________________________________________________________________________________________________________ Known Issues…

Install DataKeeper

Configure a File Server Cluster in Azure Spanning Multiple Availability Zones(AZ) » Install DataKeeper

After the cluster is created, DataKeeper is installed. It is important to install DataKeeper after the initial cluster is created so the custom cluster resource type can be registered with the cluster. If you installed DataKeeper before the cluster was created you will…

Error Messages Log

DataKeeper Cluster Edition Technical Documentation » FAQs » Error Messages Log

Question Where does DataKeeper log error messages? Answer DataKeeper events are logged in the Windows Application Event Log and the Windows System Event Log. Here is a breakdown of the messages you can look for. Application Event Log: Source = ExtMirrSvc –…

DataKeeper Target Snapshot

DataKeeper Cluster Edition Technical Documentation » User Guide » DataKeeper Target Snapshot

Overview DataKeeper’s target snapshot feature, integrated with both DataKeeper and DataKeeper Cluster Edition, is the process of creating point in time copies of replicated volumes allowing access to data on a standby cluster node without interrupting data…

DataKeeper Volume Resize

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » DataKeeper Volume Resize

DataKeeper allows users to extend and shrink their DataKeeper volumes dynamically while retaining mirror settings. Once the resize is complete, a partial resync will be performed. Note: This resize procedure should be performed on only one volume at a time. !WARNING …

Relocation of Intent Log

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Relocation of Intent Log

To relocate the Intent Log (bitmap file), please perform the following on all servers involved: *LEAVE THE MIRROR IN THE MIRRORING STATE! Do not pause it and then move the bitmap file. *Note: DataKeeper only supports bitmaps on NTFS filesystems. If the bitmaps…

SIOS DataKeeper Cluster Edition

SIOS DataKeeper Cluster Edition

Your information resource for SIOS DataKeeper Cluster Edition SIOS Technology Corp. maintains documentation for all supported versions of SIOS DataKeeper Cluster Edition. We welcome your suggestions and feedback. To help us continue to improve our documentation,…

Step 6: Install DataKeeper

How to cluster SAP ASCS and ERS on Windows in AWS using WSFC with SIOS DataKeeper » Step 6: Install DataKeeper

We are now ready to install DataKeeper. As part of the installation you will be asked to specify a service account. The only requirement is that the account must be a member of the Local Administrators group on each of the cluster nodes. Create that account and add it…

Setting Up SIOS DataKeeper

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » Setting Up SIOS DataKeeper

Setting Up SIOS DataKeeper Follow these steps to start using SIOS DataKeeper: Connect to the servers you wish to configure for replication. You can select Connect to Server from the Action pull down menu, right-click on the job folder in the left panel tree…

Step: 8 Configure DataKeeper

How to cluster SAP ASCS and ERS on Windows in AWS using WSFC with SIOS DataKeeper » Step: 8 Configure DataKeeper

It is now time to use DataKeeper to replicate the EBS volume(s) between each of the cluster nodes and to register the DataKeeper Volume Resource(s) in the cluster’s Available Storage. The steps below only need to be run on one of the cluster nodes. Connect to…

DataKeeper Volume Resize Restriction

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Restrictions » DataKeeper Volume Resize Restriction

The DataKeeper volume resize procedure should be performed on only one volume at a time.

DataKeeper Driver (ExtMirr) Message Catalog

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs » DataKeeper Driver (ExtMirr) Message Catalog

Use Control F to search for a specific error code. Code Severity Message Cause Action 1 Info The SteelEye DataKeeper driver version 7.0 has started successfully. 2 Error The…

DataKeeper Cluster Edition Installation Guide

DataKeeper Cluster Edition Installation Guide

The DataKeeper Cluster Edition Installation Guide contains information on how to properly install and license your software. The DataKeeper Cluster Edition Technical Documentation provides more detailed information necessary to complete your…

Uninstalling SIOS DataKeeper Cluster Edition

DataKeeper Cluster Edition Installation Guide » Uninstalling SIOS DataKeeper Cluster Edition

Before Removing DataKeeper If planning to uninstall DataKeeper and reinstall a previous version, all jobs/mirrors must be deleted on each node prior to uninstalling. These will need to be recreated once software is reinstalled. Uninstall DataKeeper Cluster…

Removing a Clustered DataKeeper Volume

DataKeeper Cluster Edition Installation Guide » Installation » Removing a Clustered DataKeeper Volume

To remove a Clustered DataKeeper Volume follow these steps: Launch the Failover Cluster Manager. Select the Role and related DataKeeper Storage. Remove the DataKeeper Volume resource from the Role. This will move the DataKeeper Volume resource to the…

Bitlocker Does Not Support DataKeeper

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Restrictions » Bitlocker Does Not Support DataKeeper

According to Microsoft, Bitlocker is not supported to work with Software RAID configurations. Since DataKeeper is essentially a software RAID 1, Microsoft does not support Bitlocker working with DataKeeper. Note: EFS (Encrypting File System) and TDE (Transparent Disk…

DataKeeper Cluster Edition Technical Documentation

DataKeeper Cluster Edition Technical Documentation

DataKeeper with High Availability – Cluster Edition Overview SIOS DataKeeper is a highly optimized host-based replication solution which ensures your data is replicated as quickly and as efficiently as possible from your source server across the network to one…

DataKeeper Volume Resource Private Properties

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » DataKeeper Volume Resource Private Properties

A DataKeeper Volume resource includes several private properties that are used by DataKeeper Cluster Edition. Among these properties are: VolumeLetter (REG_SZ) – the volume letter that is replicated by DataKeeper and associated with this DataKeeper Volume…

DataKeeper Cluster Edition Release Notes

DataKeeper Cluster Edition Release Notes

SIOS DataKeeper Cluster Edition Release Notes Version 8.8.2 (Version 8 Update 8 Maintenance 2) Released January 13, 2022 !IMPORTANT: If using Windows 2008 R2 SIOS DataKeeper includes a kernel-mode driver (ExtMirr.sys) which is signed with a SHA-256…

Using EMCMD with SIOS DataKeeper

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper

The EMCMD utility that ships with SIOS DataKeeper provides users with a command line method to manipulate the mirror. Because these scripts run in situations where the “normal” validation rules may not apply, EMCMD does not perform the same kinds of sanity…

Using DKPwrShell with SIOS DataKeeper

DataKeeper Cluster Edition Technical Documentation » Using DKPwrShell with SIOS DataKeeper

SIOS DataKeeper includes a powershell module (DKPwrShell) that allows a user to manipulate a DataKeeper mirror using Microsoft Powershell. Commands are passed to a SIOS DataKeeper service and will fail if the service is not running. With Microsoft Powershell v3 or…

DataKeeper Volume Resource Health Check

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » DataKeeper Volume Resource Health Check

A DataKeeper Volume resource provides two functions that are used by the Microsoft Cluster service to check for availability and health of the DataKeeper Volume resource. A simple check LooksAlive and a more rigorous check IsAlive. LooksAlive The Cluster service…

DataKeeper Service (ExtMirrSvc) Message Catalog

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs » DataKeeper Service (ExtMirrSvc) Message Catalog

Use Control F to search for a specific error code. Code Severity Message Cause/Action 17 Info The SIOS DataKeeper Service version %1 is starting. 18 Warning The SIOS DataKeeper Service has been…

DataKeeper GUI (SDRSnapIn) Message Catalog

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs » DataKeeper GUI (SDRSnapIn) Message Catalog

Use Control F to search for a specific error code. Code Severity Message Cause Action 0 Error SDRDataKeeperService: Mirror creation failed, rolling back the job endpoint. 0 Warning…

Upgrading SIOS DataKeeper Cluster Edition

DataKeeper Cluster Edition Installation Guide » Upgrading SIOS DataKeeper Cluster Edition

Upgrading DataKeeper Cluster Edition from previous versions of DataKeeper Cluster Edition is very straightforward. Simply run the installation process outlined below on all systems. The upgrade process stops the DataKeeper Service, copies the new files to the…

Deploying DataKeeper Cluster Edition in Azure

Deploying DataKeeper Cluster Edition in Azure

DEPLOYING MICROSOFT SQL SERVER 2017 FAILOVER CLUSTERS IN AZURE RESOURCE MANAGER (ARM) Before beginning, make sure you read the DataKeeper Cluster Edition Release Notes for the latest information. It is highly recommended that you read and understand the DataKeeper…

DataKeeper Cluster Edition Quick Start Guide

DataKeeper Cluster Edition Quick Start Guide

This topic provides step-by-step instructions for installing and configuring DataKeeper Cluster Edition. The series of steps includes links to the documentation that describe each step in detail. Prerequisites and Installation Read the DataKeeper Cluster Edition…

Deploying DataKeeper Cluster Edition in AWS

Deploying DataKeeper Cluster Edition in AWS

Introduction Best Practices Recommended Instance Types Manual Deployment of a SQL Server Failover Cluster Instance Automatic Deployment of a SQL Server Failover Cluster Instance

Error 1265 when running DataKeeper Takesnapshot

DataKeeper Cluster Edition Technical Documentation » DataKeeper Service Log On ID and Password Selection » Error 1265 when running DataKeeper Takesnapshot

PROBLEM: Taking a snapshot when running the command on the target system with DataKeeper fails with error 1265. C:\Program Files (x86)\SIOS\DataKeeper>emcmd (target-server-name) TAKESNAPSHOT (volume-letter of mirrored volume) Status = 1265 emcmd (target system…

Creating a DataKeeper Volume Resource in WSFC

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Creating a DataKeeper Volume Resource in WSFC

Automatic Creation of a Mirror in WSFC Use the SIOS DataKeeper GUI to configure a mirror. At the completion of the mirror creation operation, the following dialog box will pop up which will allow you to automatically add the mirror as a DataKeeper volume…

Step: 7 Relocate the Intent Log (Bitmap file)

How to cluster SAP ASCS and ERS on Windows in AWS using WSFC with SIOS DataKeeper » Step: 7 Relocate the Intent Log (Bitmap file)

For optimal performance you must relocate the bitmap file to the local ephemeral storage, aka local instance store volume. Please refer to the SIOS documentation for instructions on relocating the bitmap file .

DataKeeper Failover Clustering Resource DLL (DataKeeperVolume) Message Catalog

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs » DataKeeper Failover Clustering Resource DLL (DataKeeperVolume) Message Catalog

Use Control F to search for a specific error code. Code Severity Message Cause/Action 17 Info DataKeeper Cluster Resource ‘Online’ operation for Volume ‘Y:’ was successful. 18 …

DataKeeper Volume Not Available as Cluster Resource Type

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » DataKeeper Volume Not Available as Cluster Resource Type

WSFC Server – The DataKeeper Volume is Not Available as a Cluster Resource Type After DataKeeper is Installed in a Microsoft WSFC Environment Error/Message The DataKeeper Volume is not available as a cluster resource type after DataKeeper is installed in a…

Using Microsoft iSCSI Target With DataKeeper on Windows 2012

DataKeeper Cluster Edition Technical Documentation » User Guide » Using Microsoft iSCSI Target With DataKeeper on Windows 2012

The following topics will guide you in setting up Microsoft iSCSI Target with DataKeeper via the user interface. *NOTE: This configuration is not supported in a VMware ESX environment. …

WSFC 2012 Server Manager -- DataKeeper “Disk” Not Shown as Clustered

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 Server Manager -- DataKeeper “Disk” Not Shown as Clustered

There are some inconsistencies in how cluster disks are shown in the “Disks” display under Server Manager > File and Storage Services > Volumes > Disks. The following screen shot shows an iSCSI Shared Disk and two DataKeeper Volumes in a cluster. There is…

Antivirus Software Exclusion List for LifeKeeper and DataKeeper for Windows

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Antivirus Software Exclusion List for LifeKeeper and DataKeeper for Windows

Description Antivirus software stops LifeKeeper from updating a LifeKeeper registry key. Antivirus software also quarantines LifeKeeper and DataKeeper executables causing LifeKeeper and DataKeeper not to run properly. Suggested Action List of things to exclude in…

Remove DataKeeper Storage from a Windows Server Failover Cluster Role

DataKeeper Cluster Edition Technical Documentation » FAQs » Remove DataKeeper Storage from a Windows Server Failover Cluster Role

To remove an existing DataKeeper Resource/Mirror from Windows Server Failover Clustering: Without impacting the existing role in WSFC, i.e. File Shares, SAP, Oracle, SQL Without having to run various emcmd commands, e.g. deletelocalmirroronly,…

Using DataKeeper Cluster Edition to Enable Multi-Site Hyper-V Clusters

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Using DataKeeper Cluster Edition to Enable Multi-Site Hyper-V Clusters

Prerequisite Familiarity with Microsoft Windows Server, Microsoft Windows Failover Cluster Server Management and Hyper-V Virtual Management procedures and commands is highly recommended. Note: DataKeeper ClusterCluster Edition does not support Cluster Shared Volumes;…

DataKeeper Cannot be used as a Quorum Device for a Cluster

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » DataKeeper Cannot be used as a Quorum Device for a Cluster

Question Can a DataKeeper drive be used for a quorum disk? Answer No, a DataKeeper drive cannot be used for a quorum disk. The quorum type is set to Node Majority if the number of nodes is odd (ex: 3-node cluster). The quorum type is set to Node and File Share…

Extending a Clustered DataKeeper Volume to a Node Outside the Cluster

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Clustered DataKeeper Volume to a Node Outside the Cluster

DataKeeper Volume cluster resources can be extended to a DR Node for Disaster Recovery purposes. In the event of a complete failure of all systems in the cluster, data will be accessible on the DR Node (referred to as the “DR Node”). Here you will find instructions…

Extending a Traditional 2-Node WSFC Cluster to a Third Node via DataKeeper

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Traditional 2-Node WSFC Cluster to a Third Node via DataKeeper

When replicating from a WSFC 2-node cluster to a third node via DataKeeper, the following tasks are required: Replace the existing WSFC physical disk resource with a DataKeeper volume resource that supports data replication. Change the quorum type to Node…

Installing and Using DataKeeper Cluster Edition on Windows Server 2008 R2 / 2012 Core Platforms

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Installing and Using DataKeeper Cluster Edition on Windows Server 2008 R2 / 2012 Core Platforms

Prepare the servers. Install Windows Server 2008 R2/2012 Core on two servers, configure IP, join a domain, configure firewall for remote administration, configure the server for remote access and install the Failover Cluster feature. Server Core Installation…

Using SIOS DataKeeper Standard Edition To Provide Disaster Recovery For Hyper-V Virtual Machines

DataKeeper Cluster Edition Technical Documentation » User Guide » Using SIOS DataKeeper Standard Edition To Provide Disaster Recovery For Hyper-V Virtual Machines

Considerations When preparing a Hyper-V environment that spans subnets, subnetting may need to be taken into consideration for any applications that are running inside the virtual machine. Some applications “hard code” IP addresses into their…

Extending a Traditional 2-Node WSFC SQL Server Cluster to a Third Node via DataKeeper

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Traditional 2-Node WSFC SQL Server Cluster to a Third Node via DataKeeper

When replicating from a WSFC SQL Server 2-node cluster to a third node via DataKeeper, the following tasks are required: Replace the existing WSFC physical disk resource with a DataKeeper volume resource that supports data replication. Change the quorum type to…

DataKeeper Volume cannot come Online after Network Failure with Clustered IP Address on Replication Network

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » DataKeeper Volume cannot come Online after Network Failure with Clustered IP Address on Replication Network

If you have multiple cluster networks, IP Addresses shouldn’t be set up on the same network that DataKeeper Volume resources are using for replication. Network errors may cause the DataKeeper mirror to go into a Paused state. If the network error also causes the…

How to cluster SAP ASCS and ERS on Windows in AWS using WSFC with SIOS DataKeeper

How to cluster SAP ASCS and ERS on Windows in AWS using WSFC with SIOS DataKeeper

Introduction The following guide is a detailed, step-by-step guide on how to cluster SAP ASCS and ERS running on Windows in the AWS cloud. The examples assume that there are two nodes in the cluster (SIOS1, SIOS2) and each node resides in a different availability zone…

Windows Server 2012 -- Simultaneous Move of Multiple Clustered File Server Roles Can Result in DataKeeper Switchover Failures

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » Windows Server 2012 -- Simultaneous Move of Multiple Clustered File Server Roles Can Result in DataKeeper Switchover Failures

Description If more than one File Server role is created in Failover Clustering, each of which is using one or more DataKeeper Volume resources for storage, errors can occur if two or more roles are manually moved from one node to another simultaneously. In some…

DKSUPPORT

DataKeeper Cluster Edition Technical Documentation » Administration » DKSUPPORT

DKSUPPORT .cmd, found in the \SUPPORT directory, is used to collect important configuration information and event log files and put them in a zip file. SIOS Support Engineers will commonly request this zip file as part of the support process. To run this utility,…

IMPORTANT NOTICE

DataKeeper Cluster Edition Release Notes » IMPORTANT NOTICE

During a review of the current releases of SIOS Protection Suite and DataKeeper Cluster Edition, we discovered a memory leak issue in ExtMirrSvc.exe within DataKeeper. This issue is limited to SIOS Protection Suite and DataKeeper versions 8.8.0 and…

Administration

DataKeeper Cluster Edition Technical Documentation » Administration

The topics in this section provide detailed instructions for performing DataKeeper administration tasks. _____________________________________________________________________________________________________________________________________________________ Primary…

User Interface – Failed to Create Mirror

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » User Interface – Failed to Create Mirror

User Interface – Failed to Create Mirror, Event ID 137 Error/Message Failed to create the mirror. Event Id: 137 System Event Log Unable to initialize mirror on the target machine. Volume Device: Source Volume: E Target Machine: 10.17.103.135 Target Volume:…

Windows Server 2012 MMC Snap-in Crash

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » Windows Server 2012 MMC Snap-in Crash

Description When using the DataKeeper user interface (MMC Snap-in) on Windows Server 2012, the mmc.exe process may crash unexpectedly due to an internal .Net or Windows Presentation Foundation (WPF) issue. The error may show up on the screen and/or the event…

Known Issues and Workarounds

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds

Included below are known issues open against DataKeeper and DataKeeper Cluster Edition as well as possible workarounds and/or solutions. __________________________________________________________________________________________________________________ Access to…

Failed to Create Mirror

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Failed to Create Mirror

User Interface – Failed to Create Mirror – Application Event Log Error/Message Logged in the Application Event Log: File: .\GuiThread.cpp Line: 3099 Attempt to connect to remote system REMOTESERVER failed with error 5. Please ensure that the local…

Running chkdsk on Cluster Volumes during Cluster Volume Online

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Running chkdsk on Cluster Volumes during Cluster Volume Online

As of version 7.6 DataKeeper now runs chkdsk on all mirrored volumes prior to the volume being available for use. DataKeeper now creates a new flag DiskRunChkDsk in Windows Failover Clustering for each DataKeeper volume. The flag determines how chkdsk runs on each…

Server Login Accounts and Passwords Must Be Same on Each Server in the Cluster

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Server Login Accounts and Passwords Must Be Same on Each Server in the Cluster

The DataKeeper GUI cannot connect to the target server in a cluster if server Login Accounts and Passwords are different on each server. Error Message An Error Code 1326 will appear in the Application log (Note: The Error Code may also be a 2 with Event ID…

MaxResyncPasses Value

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » MaxResyncPasses Value

If, during a volume resynchronization, the number of passes made through the intent log exceeds the MaxResyncPasses registry value (200 by default), SIOS DataKeeper logs a message to the Event Log indicating that the resync process is taking too many passes and…

UPDATEVOLUMEINFO

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper » UPDATEVOLUMEINFO

EMCMD UPDATEVOLUMEINFO This command causes the SIOS DataKeeper service to query the driver for the correct mirror state. This command is useful if the DataKeeper GUI displays information that appears to be incorrect or not up-to-date. Note: The SIOS DataKeeper…

Windows Server 2012 Specific Issues

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues

For issues related to Windows Server 2012, see the following topics: __________________________________________________________________________________________________________________ Windows Server 2012 MMC Snap-in Crash Windows Server 2012 DataKeeper Switchover…

WSFC – MS DTC Resource Failure

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » WSFC – MS DTC Resource Failure

Error/Message The cluster resource host subsystem (RHS) stopped unexpectedly. An attempt will be made to restart it. This is usually due to a problem in a resource DLL. Please determine which resource DLL is causing the issue and report the problem to the resource…

Switchover and Failover with Multiple Targets

DataKeeper Cluster Edition Technical Documentation » User Guide » Configuring Mirrors » Switchover and Failover with Multiple Targets

In a multiple target configuration, it is important to understand how DataKeeper mirrors will work in the following scenarios: Manual switchover to a target server Source server failure followed by a manual switchover to a target server Example: In the…

Most Common DKCE Networking Solutions

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Solutions » DKCE Common Solutions » Most Common DKCE Networking Solutions

The following are the most commonly requested networking related solutions. SIOS DataKeeper Service Will Not Start DataKeeper Service Stopped Unexpectedly Issues/Symptoms: The DataKeeper Service periodically stops. The System Event Viewer will produce the…

User Guide

DataKeeper Cluster Edition Technical Documentation » User Guide

The topics in this section are designed to be a reference for you as you get started using SIOS DataKeeper Cluster Edition, helping you identify the type of configuration you are interested in implementing and providing detailed instructions for effectively using your…

Performance Tuning

DataKeeper Cluster Edition Technical Documentation » Configuration » Performance Tuning

Please refer to the following topics for ways to improve SIOS DataKeeper performance. SIOS DataKeeper Intent Log – SIOS DataKeeper uses an intent log (also referred to as a bitmap file) to track changes made to the source, or to the target volume when the target…

Components

DataKeeper Cluster Edition Technical Documentation » Components

DataKeeper Components SIOS DataKeeper for Windows is comprised of the following components: DataKeeper Driver (ExtMirr.sys) – The DataKeeper Driver is a kernel mode driver and is responsible for all mirroring activity between the mirror…

Installing Core

DataKeeper Cluster Edition Installation Guide » Installation » Installing Core

Installing the DataKeeper Cluster Edition Core Software SIOS DataKeeper Cluster Edition uses the Flexera InstallShield product to provide a standard installation interface. A license must be obtained and installed for each server in the cluster. We recommend that you…

Licensing

DataKeeper Cluster Edition Installation Guide » Licensing

Obtaining and Installing the License Activating Your License Installing Your License DataKeeper Cluster Edition requires a unique license for each server. The license is a run-time license which means that you can install it without the license, but the…

N-Shared-Disk Replicated to One

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » N-Shared-Disk Replicated to One

This configuration allows you to replicate the shared volume(s) of the primary site to a remote system across the network. This configuration is ideal for providing local failover within the Primary Site and disaster recovery protection should the entire Primary…

Split-Brain Issue and Recovery

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Split-Brain Issue and Recovery

When protecting DataKeeper volume resources in Microsoft WSFC, if all nodes are included in the cluster split-brain recovery should occur automatically. However, in a Node Outside the Cluster scenario a split-brain may occur if network connectivity is lost to the DR…

Video Solutions

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Solutions » Video Solutions

How do you resize a Volume? Summary: ISSUE: How do you resize a Datakeeper Volume? DataKeeper allows users to extend and shrink their DataKeeper volumes dynamically while retaining mirror settings. Once the resize is complete, a partial resync will be…

Configuration

DataKeeper Cluster Edition Technical Documentation » Configuration

Requirements/Considerations The topics in this section identify several prerequisites to be aware of before implementing your DataKeeper…

Primary Server Shutdown

DataKeeper Cluster Edition Technical Documentation » Administration » Primary Server Shutdown

On a graceful shutdown of the source server, all pending writes to the target are completed. This ensures that all data is present on the target system. On an unexpected source server failure, the Intent Log feature eliminates the need to do a full resync after the…

DKHEALTHCHECK

DataKeeper Cluster Edition Technical Documentation » Administration » DKHEALTHCHECK

DKHealthCheck.exe, found in the \DKTools directory, is a tool that can provide basic mirror status and problem detection of mirror issues. SIOS Support may request that you run this tool as part of the Support process. Note: DKHEALTHCHECK output is captured by…

Registry Entries

DataKeeper Cluster Edition Technical Documentation » Administration » Registry Entries

The following registry entries are associated with the SIOS DataKeeper service or driver and can be viewed and edited using Regedt32. *No values in any DataKeeper registry key should be modified unless they are listed here. Registry Entries that MAY be…

N-Shared-Disk Replicated to N-Shared-Disk

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » N-Shared-Disk Replicated to N-Shared-Disk

This configuration replicates data between sites where each site utilizes shared storage. Note that the number of systems in the Primary Site does not have to equal the number of systems in the Remote Site. Also note that only the Source Server has access to the…

Network Bandwidth

DataKeeper Cluster Edition Technical Documentation » Configuration » Network Bandwidth

Because DataKeeper can replicate data across any available network, special consideration must be given to the question, “Is there sufficient bandwidth to successfully replicate the volume and keep the mirror in the mirroring state as the source volume is updated…

FAQs

DataKeeper Cluster Edition Technical Documentation » FAQs

Refer to this section for answers to the most frequently asked questions about SIOS DataKeeper and SIOS DataKeeper Cluster Edition. ______________________________________________________________________________________________________________ Add a New Disk / DK…

N-Shared-Disk Replicated to Multiple N-Shared-Disk Targets

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » N-Shared-Disk Replicated to Multiple N-Shared-Disk Targets

This is a complex configuration which combines the aspects of replicating a shared storage environment to multiple shared targets. Note that the number of systems in the Primary Site does not have to equal the number of systems in the Remote Site. Also note that…

Most Common DKCE Installation Solutions

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Solutions » DKCE Common Solutions » Most Common DKCE Installation Solutions

The following are the most commonly requested installation related solutions. How do I get and install my license(s)? Where can I get the latest software? (Log into the Customer Portal to access) Why can’t I create a new mirror? Firewall…

Extending a Single SQL Server Node to a Cluster

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Single SQL Server Node to a Cluster

This guide explains how to install a single SQL Server node and extend it to a clustered node. Please read this document carefully prior to installation. Planning Steps: Start with a Microsoft SQL Server standalone node, where data resides on the C drive. Note:…

Step: 9 SAP High-Availability System Installation

How to cluster SAP ASCS and ERS on Windows in AWS using WSFC with SIOS DataKeeper » Step: 9 SAP High-Availability System Installation

First Cluster Node Installation Before starting the SAP Installation, make sure you have created a DNS Type A record for SAP Virtual Instance Host at DNS Server as we described in an earlier step. You will perform a regular SAP Windows Cluster installation. For more…

Mirror State Definitions

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper » Mirror State Definitions

The following numbers are used by the system to internally describe the various states. They are used by EMCMD, and they are also the state numbers found in event log entries. -1: Invalid State 0: No Mirror 1: Mirroring 2: Mirror is resyncing 3: Mirror is…

Resynchronization

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Resynchronization

SIOS DataKeeper Resynchronization SIOS DataKeeper performs resynchronization through the use of a bitmap file (intent log). It allocates memory that is used to keep track of “dirty” or “clean” blocks. When a full resync begins, SIOS DataKeeper…

Best Practices

Deploying DataKeeper Cluster Edition in AWS » Best Practices

The following recommendations should be followed for optimal performance. They include considerations specific to both the Windows operating system and AWS Cloud configuration. The primary component of SIOS DataKeeper is an upper filter volume driver. This driver…

Synchronous and Asynchronous Mirroring

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Synchronous and Asynchronous Mirroring

SIOS DataKeeper employs both asynchronous and synchronous mirroring schemes. Understanding the advantages and disadvantages between synchronous and asynchronous mirroring is essential to the correct operation of SIOS DataKeeper. Synchronous Mirroring With synchronous…

Break

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Break

Breaking a mirror is similar to the Pause and Unlock function. It suspends mirror operation and unlocks the target volume for read/write access. The difference is that the Break operation marks all bits in the DataKeeper Intent Log as dirty, which forces a full…

Continue and Lock

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Continue and Lock

This action locks the volume on the target system and then resumes the mirroring process. While the mirror is paused, writes on the source system are recorded in the SIOS DataKeeper Intent Log. When the Continue and Lock operation occurs, these changed blocks –…

Core Software

DataKeeper Cluster Edition Installation Guide » Installation » Core Software

DataKeeper Cluster Edition Core Software DataKeeper DataKeeper Driver (ExtMirr.sys) DataKeeper Service (ExtMirrSvc.exe) Command Line Interface (EMCMD.exe) DataKeeper GUI (Datakeeper.msc) Packaging files, SIOS Protection Suite…

Message Catalogs

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs

DataKeeper Failover Clustering Resource DLL (DataKeeperVolume) Message Catalog DataKeeper Service (ExtMirrSvc) Message Catalog DataKeeper Driver (ExtMirr) Message Catalog DataKeeper GUI (SDRSnapIn) Message Catalog

Manual Deployment of a SQL Server Failover Cluster Instance

Deploying DataKeeper Cluster Edition in AWS » Manual Deployment of a SQL Server Failover Cluster Instance

*DISCLAIMER: While the following completely covers the high availability portion within the scope of our product, this is a setup “guide” only and should be adapted to your own configuration. *Please refer to the AWS Marketplace for a list of supported…

Clustering

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering

Running chkdsk on Cluster Volumes during Cluster Volume Online Creating a DataKeeper Volume Resource in WSFC Manual Creation of a Mirror in WSFC DataKeeper Volume Resource Health Check DataKeeper Volume Resource Private Properties Extending a Clustered DataKeeper…

Unable to Determine Previous Install Path

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Unable to Determine Previous Install Path

Installation – Fatal Error: Unable to Determine Previous Install Path Error/Message Fatal Error: Unable to determine previous install path. DataKeeper cannot be uninstalled or reinstalled. Description When performing a “Repair” or…