Hi All,
I`m deploying new Media Agents and configuring as RAID 1 for DDB and Index on SSB Drives. My question is related to the best attributes for a RAID that will host DDB / Index. Is this defined by Commvault? Thanks
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Cisco UCS RAID Attributes for DDB/Index
+15Best answer by Bdas
Hi,
Though the Strip size attribute is not documented . From deployment experience, 64K will give you a 128K stripe size. This is small enough as to not waste a lot of space, yet large enough where performance with large files should be satisfactory. With regards to DDB volume , 64K should be good enough as the large files is less of a condition with DDB structure .
Thanks & Regards
+5- Vaulter
- 20 replies
Hi, thanks for raising this matter.
Commvault does not define specific write policies for DDB volumes. However, if your RAID controller has a battery, then feel free to use “Write Back Good BBU”. As you may be aware, write back improves performance at the cost of being vulnerable to a power outage or similar disaster as the writes are cached first whereas write through is an immediate write to the disk.
In either case, it is personal preference.
+15How about strip size?
+3- Vaulter
- 8 replies
- Answer
Hi,
Though the Strip size attribute is not documented . From deployment experience, 64K will give you a 128K stripe size. This is small enough as to not waste a lot of space, yet large enough where performance with large files should be satisfactory. With regards to DDB volume , 64K should be good enough as the large files is less of a condition with DDB structure .
Thanks & Regards
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