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Bug #3872

open

Poor performance on ramdisk

Added by Anthony Glidic almost 9 years ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Start date:
2013-07-07
Due date:
% Done:

0%

Estimated time:
Difficulty:
Medium
Tags:
needs-triage
Gerrit CR:

Description

Hello guys i just create a ramdisk with the ramdiskadm command,

i create a zpool on it and i setup my zfs properties to:
recordsize 4k
checksum off
atime off
compression off
deduplication on
sync disabled

I put some vdi desktop on it (the dedup ratio is just awesome) but the performance are quite bad (only 1000 Iops by Desktop with 10 Desktop and a latency of 10 ms, it's just not good for a ramdisk).

Did someone play with ramdisk? Did i need special parameter to have good performance in that case?

Thanks

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