Got in yesterday (6/28/2010) and planned to attend an afternoon session but I got hung up on a few items that required my attention. Attendance looks pretty good, food was a bit weak this AM but I am more of a coffee only person in the morning so not a huge deal for me. Internet connectivity is stellar thus far hopefully this keeps up. Looking forward to the sessions this week, I am starting the week with a session on entitled Mastering IP Subnetting Forever. I will be blogging as always from the sessions I attend. TTFN
Avamar DS18 = Utility Node + Spare Node + 16 Active Data Nodes
For a 3.3. TB Gen-3 Grid
RAID Configuration:
How to calculate the required capacity:
Data Gathering
Note: Agent only vs. data store depends on the desired RPO
If RTO < restore_rate then data store else agent only
Always use 3.3 TB nodes when configuring unless additional nodes are required to increase the ingestion rate.
Use the default de-dupe rate unless a POC or assessment has been performed.
Sizing Considerations:
Non-RAIN node must be replicated this includes single node Avamar deployments and 1×2 (1 utility node and 2 data store nodes – this is non-RAIN config) configurations.
**** Remember this: As a general rule it seems that transactional databases are better suited to be backed up to Data Domain and NOT with the Avamar as the hashing of databases is generally very slow.
VMware (specifically using the VMware Storage APIs) and CIFS are well suited for Avamar
Data save rates:
Scan rate:
Performance:
Restores:
Data Fetch Process
NDMP Sizing:
L-0 Fulls on happen once (we don’t want to size for them)
Size for L-1 incremental which will happen in perpetuity following the completion of the L-0 full.
2 Accelerator Nodes
| Config | Max Files | Max Data | Max Streams | |||
| Celerra | NetApp | Celerra | NetApp | Celerra | NetApp | |
| 6 GB | 5 m | 30 m | 4-6 TB | 4-6 TB | 1-2 | 1-2 |
| 36 GB | 40 m | 60 m | 8-12 TB | 8-12 TB | 4 | 4 |
NDMP throughput ~ 100 – 150 TB/hr
Assumed DeDupe Rates:
Tip: Based on scan rate and the amount of data stored for DB backups you can see why Avamar may not be the best choice for DB backups.
NDMP Tips:
Desktop / Laptop
Sizing:
DS18 can support ~ 5000 clients
Number of streams per node default is 18 (17 are usable, one should be reserved for restores).
That completes the brain dump. Wish I had more but that is all for now.
If you have not heard EMC announced a product called VPLEX at EMC World 2010 this week.
Note: I was watching and documenting at the same time so feel free to make any corrections to the data below.
What is the VPLEX recipe (what am I tasting in the session):
What you get:
The concept of VMotion is facilitated by the the presentation of a VPLEX Virtual-Volume.
Some infrastructure details:
VPLEX Metro is a geo dispersed cluster-pair that presents one VPLEX virtual volume across data centers. Read I/O benefits from local reads when accessing a VPLEX virtual volume.
Requirements/Rules:
Simulation/Example :
Testing was performed on MOSS 2007, SQL Server, SAP and Oracle using workload simulation tools.
Test Scenarios:
Note: With these requirements this technology will pretty much be relegated to enterprise class customers with dark fibre between sites. With that said technology looks pretty cool if you can afford the infrastructure.
According the The Storage Anarchist’s blog “VPLEX comes to market with two mainstream customer references: AOL and Melbourne IT (who will be replacing their sheep farmer-endorsed product with the more applicable VPLEX)”
Check ot the VPLEX/VMotion Whitpaper
Well, I have pretty much gotten my ass kicked by EMC certification exams this year. Day one Centera exam was a big miss (kind of expected this one), BRS TA E20-329 was a near miss yesterday, 28 questions of 70 on Avamar and Data Domain, wonder if this provides any insight on the future of Networker, considering on the previous BURA TA the majority of the questions were Networker questions I find this pretty telling. This morning a near miss on the RecoverPoint E22-275 exam, 1 of 7 on the Brocade SAS section (ouch), but who the heck uses Brocade fabric splitters?
Anyway, hopefully I can get a win this afternoon, feeling pretty beat down, my cold is not helping. I wonder how much Sudafed I can take before I damage vital organs
Note: Sequential workloads are still (typically) better served by traditional rotational media (e.g. – backup-to-disk)
Questions:
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