Question about LSFS size on SSD and sector size

rriiicchh · Tue Jul 29, 2014 4:57 pm

Meant to say in my testing the deduplication level wasn't enough to make up for the difference in size as I am seeing generally 1.1x on the de-duplication which isn't worth the RAM overhead.

Therefore I have generally avoided it as I figured that I'd get better performance by allowing that RAM to work as a L1 cache for StarWind or to be presented to the VMs as RAM limiting the number of reads that are required anyway.

Perhaps this was an earlier version because generally the data we have (ignoring the SQL databases) deduplicates really well as it is about 4 million flat text files so I might have to check that out in the next version as well to see if there is an underlying issue.

Tue Jul 29, 2014 5:05 pm

I'd re-run the tests and ask for assistance. LSFS is a better choice for flash then FLAT (space reduction, flash-friendly, faster aggregated writes etc).

rriiicchh wrote:Meant to say in my testing the deduplication level wasn't enough to make up for the difference in size as I am seeing generally 1.1x on the de-duplication which isn't worth the RAM overhead.

Therefore I have generally avoided it as I figured that I'd get better performance by allowing that RAM to work as a L1 cache for StarWind or to be presented to the VMs as RAM limiting the number of reads that are required anyway.

Perhaps this was an earlier version because generally the data we have (ignoring the SQL databases) deduplicates really well as it is about 4 million flat text files so I might have to check that out in the next version as well to see if there is an underlying issue.