in the words of a long dead English professor... "there is no point in the English language where 2 positives create a negative sense" ... student in the audience shouts out "yeah, right."
Storage Spaces design on a pure SSD setup
- Thread starter Eson
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With all ssds mirror with as many columns as you can get. Reads speeds will max out like raid0 writes will end up being half the total pool speeds. I have had set ups with 12 and 24 column mirrors and they have been really fast on socket 2011 systems. Like 12gb/s writes 24gb/s reads.
This is getting a bit frustrating, even running the P840 in HBA-mode Im still experiencing weird behaviour. The screenshots is from 8x480gb Intel 530 SSD in one SS single parity pool. I the performance numbers seem alright but the latency numbers cant be right?
Ive had peaks upward of 200ms, is this normal? Even if I split the SS up and try a single disk I get latencys of 20-40ms. Is the HP card still doing some weird shit?
These numbers are with one test VM running so basically no load.
Ive had peaks upward of 200ms, is this normal? Even if I split the SS up and try a single disk I get latencys of 20-40ms. Is the HP card still doing some weird shit?
These numbers are with one test VM running so basically no load.
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How you can live with those write numbers is beyond me. I gave up on SS a while back.
Parity pools are horrible for write performance. Even with SSD's, I don't think I'd expect to see it perform well.
Well, my options are pretty limited right now. The money has been spent on the P840 and Intel SSDs, since they arent working together Im trying to find the least bad alternative.
Yea, right now though Im trying to understand if the response times Im getting are reasonable or if something is still weird with the P840-card.
Try mirroring (RAID10 alike) in Storage Spaces. Seems to be much better then the different parity-modes in Storage Spaces and especially better when using SSD's.
I've heard people say that parity in SS gives them the same performance comparible with running on only 1 of the disks.
I've heard people say that parity in SS gives them the same performance comparible with running on only 1 of the disks.
