SPO3292
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Transcript of SPO3292
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SPO3292
VeeamBackup & Replication:Tips and Tricks
Anton GostevVeeam Software@Gostev
Doug HazelmanVeeam Software@VMDoug
#vmworldsponsor
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Quick Overview of v6 Architecture Backup servers
Backup proxy serversBackup repositories
“Automated everything” Intelligent load balancing Centralized management via Enterprise Manager
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Scaling your backups3 simple rules
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Scaling your backups1. Keep the management server happy
● Disable default proxy (requires 6.1 or later)● Allocate enough RAM for job manager processes● Keep concurrent (running) jobs under 100 per management server
2. Backup proxy servers: the more, the better?● No! Too much load on storage and network● Use max concurrent tasks limit on proxies or repositories● Watch for “job timed out waiting for resources” messages
3. Backup repository considerations● Be careful with the reversed incremental backup mode!● Limit concurrent jobs on backup repositories to a reasonable amount● Use ingest rate throttling for cross-SAN backups
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A word on backup repositories Don’t underestimate the importance of performance!
● By far, the most commonly reported bottleneck
What makes the best backup repositories?● Windows or Linux server (can be same as backup proxy server)● Local storage, DAS or SAN mounted for physical server● pRDM disk (vSphere 5+), or iSCSI LUN connected via in-guest iSCSI
for virtual server
Sub-optimal backup storage● NAS or network share● VMDK on VMFS (size and recoverability considerations)
RAID level● If you can afford it, use RAID10 (again, performance)
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Processing ModesAll you need to know
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Direct SAN Access: The good Fastest processing mode Least impact on production
● Backup processing is fully offloaded to dedicated backup proxy servers● Backup traffic is isolated to the storage network (aka LAN-free)
Does not impact consolidation ratio, so cheapest too
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Direct SAN Access: The bad Supports block storage only
● FC (fibre channel): physical backup proxy server only!● iSCSI: physical and virtual backup proxy servers both supported
Physical backup proxy server requirement for FC SAN● Might not go along well with your virtualization project● Consider repurposing older servers
Might be hard for beginners to setup● See Veeam Forums FAQ for step-by-step guide
Manual datastore mapping might be required● For certain SANs, B&R may not able to detect proxy connectivity
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Direct SAN Access: The ugly What’s the worst that could happen? Windows re-signaturing your VMFS LUNs!
● vSphere will no longer recognize datastores● Don’t panic, VMware Support should be able to fix
Three easy ways to get into trouble1. Windows Explorer automounting new volumes (but not with Veeam)2. Clicking Disk Management snap-in popup without reading3. Giving Local Administrator rights to random people
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Direct SAN Access: The safe way Present VMFS LUNs to backup proxy server as read-only
● Most SANs support it these days—chase your vendor if yours does not
Disable automount on your backup proxy servers● Do it the right way: use SANPolicy Windows setting!● Veeam backup proxy server setup does this automatically for you
Disable Disk Management snap-in with Group PolicyUser Configuration > Administrative TemplatesWindow Components > Microsoft Management Console >Restricted/Permitted snap-ins > Disk Management
Keep Local Administrator rights on backup proxy servers to yourself● Cannot really do this for default proxy due to FLR requirement● Another reason to use dedicated backup proxy server!
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Direct SAN Access: Tips & tricks Got a fast SAN? Get a modern backup proxy server!
● Multi-core CPU (compression) and fast RAM (inline deduplication)
Update firmware and drivers across the board Disabling MPIO may increase performance iSCSI SAN? Tweak TCP/IP on backup proxy netsh interface tcp set global autotuning level = disable
Increase read-ahead buffer● Default is 4MB (optimal setting for most SANs)● To change, create the new value in bytes: VddkPreReadBufferSize (DWORD)
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Hot Add: The good Easy to setup—very little planning involved
● Any Windows VM can be made a Hot Add backup proxy
Fast data transfers with any storage● Direct storage access (albeit through ESXi storage stack)
Supports all types of storage (including NFS)● Shared storage: at least 1 backup proxy server per vSphere cluster● Local storage or DAS: at least 1 backup proxy server per host
Use your existing Windows VMs (save on licensing)● Data processing engine process runs with lower priority (6.1)● Further CPU usage reduction in 6.5
Allows for 100% virtual deployment
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Hot Add: The bad Not as mature as other modes Affects your consolidation ratio
● Backup proxy servers take host resources● Ultimately means more ESXi hosts, and more VMware licenses
Hot Add process itself is slooow● Can take up to 1–2 minutes to complete for each VM—adds up quickly!
Hot Add as a vSphere feature has a number of limitations● Good news—many are being removed as VDDK matures● See FAQ on Veeam forums FAQ for the complete list
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Hot Add: The ugly Snapshot removal problems due to locks
● Veeam B&R: multiple hooks in place to work around
CBT must be disabled on backup proxy VM● Prevents stun on Hot Add due to CBT initialization
NFS-specific issue● Extended VM stun on hot remove in some scenarios
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Hot Add: Tips & tricks Add extra virtual SCSI controller to backup proxy server
● A single SCSI controller can have a maximum of 16 disks attached● Concurrent jobs on the same backup proxy server can result in more!
Keep vSphere and Veeam up to date● Single block size in VMFS5 removes the most common hot add issue● Latest Veeam Backup & Replication will have latest and greatest
VDDK version
Try increasing read-ahead buffer● Seems to really help with certain NFS storage
Avoid cloning backup proxy VM ● For example, to provision additional backup proxies
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Network (NBD): The good Easy to setup—in fact, no setup is required
● Any existing server (physical or virtual) would do
Supports all types of storage, including NFS● Server placement does not matter (unlike with Hot Add)
Very quick to initialize data transfer Can be quite fast—with 10Gb Ethernet
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Network (NBD): The ugly Painfully slow performance on 1Gb Ethernet
● Average speed reported is 10-20 MB/s
Leverages ESXi management interface
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Network (NBD): Tips & tricks1 Gb Ethernet Use for sites with low change rate
● Works faster than other processing modes in such conditions
Keep at least one Hot Add backup proxy server around● Full VM and virtual disk restores take forever over NBD
Keep in mind intelligent load balancing algorithms● Network backup proxy servers have lowest priority!
Upgrade to 6.1 or later● Improved network proxy location awareness
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One last thing This hack significantly reduces supportability! Cut up to 5 minutes of processing time per VM by
disabling VDDK logging Apply in stable environments only!
● Create the new value and set to 1: DisableVDDKNetworkOutput (DWORD)
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Deduplicating StorageYes, you can afford it!
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Deduplicating storage: The good What gives? Global dedupe!
● Deduplication across backup files from different jobs● Perfect for long-term backup archival
Top hardware appliances among Veeam users● EMC DataDomain● ExaGrid● HP StoreOnce
Top software appliances among Veeam users● ZFS-based appliances● StarWind
Windows Server 2012 dedupe is awesome
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Deduplicating storage: The bad Hardware appliances are expensive
● Although they do provide excellent dedupe ratio
Software appliances are resource hogs ● Both performance and dedupe ratio are sub-par, too
Windows Server 2012 dedupe is awesome● Included free of charge—start using it today!● Provides very decent dedupe ratio
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Deduplicating storage: The ugly Random access performance is lacking
● A problem for all solutions featuring inline deduplication● Typically insufficient out-of-the-box for large-scale vPower usage
Exception: post-process deduplication ExaGrid
● Raw disk landing zone (full-speed vPower from recent backups)● Veeam-specific logic further optimizes performance
Windows Server 2012 ● Backups “land” on raw storage at full speed● Only old backup files are deduplicated—great for vPower● Decent speed even off already deduped backups
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Deduplicating storage: Tips & tricks Already own storage with inline deduplication?
● Inline data “rehydration” process is what makes vPower slow
Reduce the block size in Advanced job settings● WAN (256KB) and LAN (512KB)● Reduced block size might impact backup performance
Use Linux-based backup repository● Large client cache, or even caching client file system (FS-cache),
can significantly improve vPower performance
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Deduplicating storage: Tips & tricks (continued)
Keep Veeam dedupe on Use incremental backup mode
● Choice of synthetic or active fulls depending on actual storage
For best dedupe ratio on device side…● Disable compression (significantly increases amount of data transferred
from backup proxy server to backup repository over network)
For best backup performance and smallest window● Keep compression at default
If you like to avoid extremes…● Set compression to Low (dedupe-friendly)
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Deduplicating storage: Tips & tricks (continued)
Got more than one deduplicating storage device? Use internal replication to sync backups offsite!
● Extremely traffic-efficient approach● Many customers use and report great success!
Keep the backups imported for easy DR● To automate repository refresh in DR site, use:
Get-VBRBackupRepository -Name "DR_Repository" | Sync-VBRBackupRepository
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WAN AcceleratorsYour WAN on steroids
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WAN accelerators: The good Two types of WAN accelerators
● Caching WAN accelerators provide significant bandwidth savings with Veeam replication, but are typically quite expensive
● Transport layer WAN optimizers are unlikely to offer significant bandwidth savings with Veeam replication, and are usually cheap
Both improve reliability of TCP● Long distance wireless or satellite links● IPsec rekey operations on a VPN tunnel● WAN links with high jitter, packet loss or occasional drops
Both allow long-running jobs to finish more consistently● For example, initial replication over network
Both improve WAN utilization for most workloads
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WAN accelerators: What’s hot? Top caching WAN accelerators among Veeam users
● Cisco WAAS● Riverbed● SilverPeak
Top WAN optimizers among Veeam users● Hyper-IP
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WAN optimizers: Tips & tricks Veeam Backup & Replication leaves little room for
bandwidth reduction by WAN optimizers Built-in WAN optimizations in v6:
● Multiple TCP streams to maximize throughput● Network traffic compression
Consider using on unreliable networks, but don’t expect them to add you extra bandwidth● Update to Backup & Replication 6.1 Patch 1 before evaluating
Veeam Backup & Replication not using all available bandwidth?● Increase the amount of TCP streams (default is 5) DownloadStreamsNumber (DWORD)
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Caching WAN accelerators: Tips & tricks Multiple TCP streams can cause issues!
● Disable multiple streams in B&R traffic throttling settings
Disable network traffic compression in Veeam● Low (dedupe-friendly) compression level might be a better option
If required, have network admins configure bypass on Veeam backup proxy servers to avoid polluting caches
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Veeam Backup & Replication 6.5We never stand still
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What’s coming in 6.5 Veeam Explorer for Microsoft Exchange Veeam Explorer for SAN Snapshots VMware vSphere 5.1 support Windows Server 2012 support
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Veeam Explorer for Microsoft Exchange Visibility into Exchange VM backups
● Immediate: No need to provision storage, restore the VM or restore the mailbox store
● Agentless● Requires no special backups or metadata collection—even works with
existing Veeam backups (and SAN snapshots) Free!
● Included in all versions of Veeam Backup & Replication 6.5,including Free Edition
● Eliminates need for expensive standalone tools licensed per-mailbox
Currently available in “exclusive beta”Just restored a 145 GB #MSExchange Public Folder database in 2 min. using @veeam. Then restored a single item all under 10 min. SWEET!
The new #veeam explorer for exchange looks veeamy. That's right, I just made up a new word (it means awesomesauce)
Really excited with the new @veeam Explorer beta for #Microsoft Exchange VM backups - we have lots of interested customers ready for this!
Even the *beta* of @veeam Exchange Explorer works a treat. Saved literally, hours of work.. and saved my bacon. #recommend
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Veeam Explorer for Microsoft Exchange (continued)
Capabilities● Browse: familiar Explorer-type interface● Search: familiar Outlook-like Find, including Advanced Find● Export: export to PST file, MSG file or attachment
Uses cases● E-discovery● Item-level restore: export and send to affected user● Mailbox archive
Supports Exchange Server 2010
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Veeam Explorer for SAN Snapshots Veeam restores from SAN snapshots Supports tiered data protection strategy Perform all restores through familiar, easy-to-use
Veeam interface Supports HP StoreVirtual VSA and HP LeftHand
SAN snapshots + Veeam restore = Best RPOs and RTOs for operational recovery
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Veeam Explorer for SAN Snapshots (continued)
Fast: recover entire VM or individual items in < 2 minutes● Fully automated: clone & promote snapshot, present to vSphere, clean up● Restores directly from VM files on the SAN snapshot: no staging or
intermediate restores required
Flexible● Specific VM● Individual guest files: Windows, Linux, et al● Individual Microsoft Exchange items
Free● Worry-free: automated process eliminates human errors and protects
integrity of SAN snapshots and production LUNS● Agent-free: no agents to deploy on hosts or VMs● Literally free: included in all editions of Veeam Backup & Replication 6.5,
including Free Edition
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Questions? Comments?
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Thanks for attending!
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SPO3292
VeeamBackup & Replication:Tips and Tricks
Anton GostevVeeam Software@Gostev
Doug HazelmanVeeam Software@VMDoug
#vmworldsponsor