DataKeeper for Windows All Documentation - SIOS

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Snapshot Location SizeIMPORTANT: The maximum size of a volume to be snapshotted is 2 TB.When configuring the snapshot location, make sure it meets the following criteria:• Is only used when a snapshot is requested.• Cannot be stored on a DataKeeper mirrored volume.• Can store multiple snapshot files for different volumes.• Must have enough free space to create and accommodate a file that will grow depending on the sourcemirrored volume size and writes during snapshot use.Note: Do not change the snapshot location during a snapshot.Snapshot Location SizeThe size of the snapshot location should be determined on an individual basis based on severalcriteria. In practice, the size required for the snapshot file will be far less than the size of thevolume being snapshotted. The storage required needs to be big enough to contain any data thatchanges on the source system while the snapshot is being used. All snapshot files will bezeroed out each time a snapshot is initiated and will incrementally grow in size during use. Thefiles will be deleted when the snapshot is dropped. Given that the copy on write process onlywrites "changed" blocks to the snapshot file, consideration should be given to the duration of thesnapshot as well as the rate of change in the volume being mirrored. Once an historical viewcan be established of snapshots from past activity, the size can be re-evaluated.BEST PRACTICE: Be conservative in your estimate, assuring that there isexcess space available. If enough space is not allocated and the limit is reached,your snapshot will be dropped.Snapshot Location Selection1. Right-click on the appropriate mirror and select Mirror Properties.2. From the Mirror Properties dialog, select the Snapshots tab.DataKeeper for Windows Technical DocumentationPage 134
Snapshot Location SelectionNOTE: DataKeeper will use the snapshot location configured onthe target node; however, since either node in the mirror canbecome target, the snapshot location may be configured on boththe source and the target.3. Use the browse button to choose the location for the snapshot or type the path intothe text box.DataKeeper for Windows Technical DocumentationPage 135
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DataKeeper for Windowsv7.6Technical
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Specifying Network Cards for Mirror
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TargetPortIncr * 48TargetDispatchPo
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Continue and Lock 111Partial Resync
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Planned Switchover 150Unplanned Swi
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Index 176Table of Contentsxii
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User InterfaceUser InterfaceSteelEy
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DataKeeper Service Log On ID and Pa
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Page 22 and 23:
Understanding ReplicationEnvironmen
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SteelEye DataKeeper Resynchronizati
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Synchronous Mirroringvolume write,
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Asynchronous MirroringIn the diagra
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Mirror RESYNCINGMirror RESYNCINGWhe
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Volume Considerationsthe write requ
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Mirror State CountersMirror State C
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Queue High WaterQueue High WaterDef
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Resync PhaseRange: 0 - MAX_ULONGThi
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Chapter 3: ConfigurationRequirement
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Firewall ConfigurationsEnvironmentM
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Configuring Microsoft's Windows Fir
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High-Speed Storage Best PracticesHi
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Handling Unmanaged Shutdown IssuesH
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Verifying Data on the Target Volume
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Chapter 4: AdministrationThe topics
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Extensive Write ConsiderationsExten
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BandwidthThrottle †\{Target IP}Th
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TargetPortBase *Specifies the maxim
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WriteQueueHighWater * †WriteQueue
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Registry Entries that SHOULD NOT be
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ErrorControl\CurrentControlSet\Serv
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BuildTimeBuildTimeLocation: HKEY_LO
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VolumeAttributesSnapshotDeviceREG_S
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SourceDriveLetterSpecifies the driv
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BreakUserRequestedBreakUserRequeste
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CHANGEMIRRORENDPOINTSThis is the so
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2x1 Mirror CHANGEMIRRORENDPOINTS Co
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CLEARASR_OKSYS1.MYDOM.LOCAL;J;172.1
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CREATEMIRRORCREATEMIRROREMCMD CREA
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GETASR_OKThis command will notify D
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GETJOBINFOThis command returns exte
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GETREMOTEBITMAP4: Mirror is paused5
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GETSNAPSHOTLOCATIONDriver Version =
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GETVOLUMEINFO1: Mirroring2: Mirror
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LOCKVOLUMERAW filesystemFAT filesys
Page 98 and 99: RESTARTVOLUMEPIPEWriteQueueLowWater
Page 100 and 101: STOPSERVICEThis command sets the sn
Page 102 and 103: UPDATEVOLUMEINFOUPDATEVOLUMEINFOEMC
Page 104 and 105: One-to-OneExample:USECASEReplicate
Page 106 and 107: One-to-Many (Multiple Targets)One-t
Page 108 and 109: N-Shared-Disk Replicated to OneAddi
Page 110 and 111: N-Shared-Disk Replicated to Multipl
Page 112 and 113: Disconnecting from a ServerDisconne
Page 114 and 115: Creating Mirrors With Shared Volume
Page 116 and 117: Safe Creation of a Shared-Storage V
Page 118 and 119: Switchover and Failover with Multip
Page 120 and 121: Source Server Failure - Manual Swit
Page 122 and 123: Renaming a JobRenaming a Job1. Sele
Page 124 and 125: Requirements for SwitchoverNote: If
Page 126 and 127: Breakusually much quicker than a fu
Page 128 and 129: Shared Volume Procedure - Basic Dis
Page 130 and 131: Mirror PropertiesThis dialog displa
Page 132 and 133: Working With Shared VolumesWorking
Page 134 and 135: Using Microsoft iSCSI Target With D
Page 136 and 137: Installation of the iSCSI Target2.
Page 138 and 139: Creation of Mirror and Configuratio
Page 140 and 141: Creation of iSCSI Virtual Disks8. S
Page 142 and 143: Setting Up Multiple Virtual Disks W
Page 144 and 145: DataKeeper Target Snapshot5. Right-
Page 146 and 147: Local WriteIf the block has not bee
Page 150 and 151: Snapshot Location SelectionWhen cli
Page 152 and 153: Source Out of ServiceSource Out of
Page 154 and 155: TargetSnapshotBlocksize Registry Va
Page 156 and 157: Create and Configure a Hyper-V Virt
Page 158 and 159: Create and Configure a Hyper-V Virt
Page 160 and 161: Install an Operating System and Any
Page 162 and 163: Configure the Target Server to Run
Page 164 and 165: Planned/Unplanned SwitchoverPlanned
Page 166 and 167: Unplanned Switchover5. Log into the
Page 168 and 169: Chapter 6: Frequently Asked Questio
Page 170 and 171: Inability to Create a Mirror• Sou
Page 172 and 173: Split-Brain FAQsAnswerYes, beginnin
Page 174 and 175: Using Volume Shadow CopyReplication
Page 176 and 177: Chapter 7: TroubleshootingThe topic
Page 178 and 179: Counter Logs Do Not Work on Windows
Page 180 and 181: System Event Log - Create Mirror Fa
Page 182 and 183: Windows Server 2012 MMC Snap-in Cra
Page 184 and 185: Creating Mirrors with Shared Volume
Page 186 and 187: Windows Server 2012 NIC Teaming Iss
Page 188 and 189: CHKDSKThis command, which is used t
Page 190 and 191: IndexIndexAAsynchronous 11Change Mi
Page 192 and 193: IndexFilename 154Firewall 32Full Re
Page 194 and 195: IndexPerformance Monitor Counters 1
Page 196: IndexVolume 18Size 18Volume Shadow
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