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  • 8 votes cast
Jul
5
awarded  Notable Question
Mar
3
accepted How much throughput increase to expect from link aggregation (LACP/802.3ad)?
Oct
29
awarded  Popular Question
Jun
21
comment Using ZFS head node as database server?
@Craig Ringer I see, it sounds to me then that it's possible, just a technically-challenging endeavor. Perhaps you'd recommend that I should just have 2 identical JBODs, each with a single head also acting as a Postgres server, and figure out the automatic failover from there instead? Would be interesting to hear other views on this. It also still doesn't really deal with my main question - should I be using the ZFS head as the Postgres server as well?
Jun
21
revised Using ZFS head node as database server?
deleted 1 character in body
Jun
21
comment Using ZFS head node as database server?
@CraigRinger Hm, is this contradictory to wiki.postgresql.org/wiki/Shared_Storage?
Jun
21
asked Using ZFS head node as database server?
Mar
13
accepted Difference between SAS multilane, direct-attached HDD and expander backplane?
Mar
13
revised Difference between SAS multilane, direct-attached HDD and expander backplane?
added 271 characters in body
Mar
11
asked How much throughput increase to expect from link aggregation (LACP/802.3ad)?
Feb
25
comment No advantage from SSD boot drive for 24/7 server?
Good point on the costs - I nearly forgot. SSD idle vs HDD idle power consumption in a 24/7 application could probably breakeven for its initial cost within 1-3 years.
Feb
25
asked No advantage from SSD boot drive for 24/7 server?
Feb
19
asked Difference between SAS multilane, direct-attached HDD and expander backplane?
Feb
19
awarded  Commentator
Feb
19
comment Using SATA III SSDs for ZFS pools
Got it, I've a better idea how it works now. What about something like 6 RAIDZ-3 vdevs of 7 disks each? Trumps 14 3-way mirrors in capacity, better redundancy, still cheaper (capacity/$) than a hardware RAID-10 build.
Feb
19
comment Using SATA III SSDs for ZFS pools
P.S.: I mixed up vdev and zpool in my above posts, I meant to say 2 RAIDZ-3 vdevs of 11 disks each. Hm, could you elaborate? Should I drop it to 7 disks per vdev? I'm planning another build with 4 TB nearline SAS hard drives, 11 drives per vdev as well, and that would perform even worse if that's what you're saying. In the case of the 4 TB drives, I figured triple parity would be necessary given the value of the data and the time it takes to resilver the drives.
Feb
19
accepted Using SATA III SSDs for ZFS pools
Feb
19
comment Using SATA III SSDs for ZFS pools
Gotcha, thanks for the link. I'll go back and do some homework based on your recommendations.
Feb
19
comment Using SATA III SSDs for ZFS pools
Can't thank you enough. My original plan was 2 RAIDZ-3 zpools of 11 disks each. Each disk would be a 960 GB SATA SSD. We use Supermicro exclusively... Exact case and mobo would depend on the other design factors but I was tentatively planning to use a Supermicro 216BA-R920WB. I'm guessing this rules out the SATA SSDs and I'm forced by budget to go with the 15k SAS disks... :/
Feb
19
comment Using SATA III SSDs for ZFS pools
I see, that's helpful... I'll almost certainly be using SATA SSDs as SAS SSDs are too pricey.