Greg Byshenk wrote:
On Sun, Aug 20, 2006 at 07:51:29PM +0200, Miroslav Lachman wrote:
Greg Byshenk wrote:
[...]
This happened four times (with the same errors that have been discussed
here), running 6.1 STABLE as of June 22. Before attempting to RMA the
drives, I tried an updated kernel, 6.1 STABLE as of July 19. Strangely
enough, the problems disappeared.
So, while I have not checked everything that has changed, it _might_ be
worth trying 6.1 STABLE...
I have problems with 6.1-RELEASE same as with 6.1-STABLE from August 2.
I can try newer STABLE, but as I see on cvsweb, there are not much
changes in ATA driver sources, only new chipsets added.
It is only an idea, based on something that worked for me. And, as I
said, my situation is not exactly the same as the others.
It is strange to me, that I can see significant changes of read/write
speed. (I am running nonstop tests with writing disk full of files,
delete them, and start again + generating graphs) Speed vary from
2.5MB/s to 11MB/s by jumps. Not continuous from the lowest to the
highest. Writing is for example 3MB/s for 20 hours, then jump to 10MB/s
and after some time (6 - 20 hours) jump down to about 3MB/s.
After some days of testing, disk disappear, system reboots itself,
resynchronize gmirror and work for next few days till the next disk lose.
Also earlier synchronization was done after 1:30 hour (at about 30MB/s),
now synchronization run at lower speeds - from 2.5MB/s to 15MB/s, so the
whole synchronization is done after more then 5 hours (the longest was
20 hours to synchronize 250GB HDDs)
I don't know what more can I test, what more could be done to solve
these problems. :(
You are using gmirror, which I am not, so the situations are not
analogous, since my situation was with h/w RAID. And I have no direct
experience with gmirror (I use gvinum on a couple of secondary systems,
but those are SCSI based).
Does the output of 'systat -vm' tell you anything of interest? That is,
are the disks running at or close to 100%, are the CPUs fully loaded, or
anything else...?
There is nothing interesting in systat / gstat / top or anything else.
System is almost idle, just running test script for disk writing. Speed
problems is not dependent on gmirror. I deactivated gmirror on second
machine and run test on normaly mounted filesystems with same low speeds ;(
This is systat from gmirrored system running test:
4 users Load 0.01 0.02 0.00 Aug 20 21:06
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 124144 9580 897616 27168 43016 count
All 1016728 75888364464876 210508 pages
Interrupts
Proc:r p d s w Csw Trp Sys Int Sof Flt cow 4144 total
7 75 979 4 155 288 27 161484 wire
1: atkb
191292 act
14: ata
0.4%Sys 0.0%Intr 0.0%User 0.0%Nice 99.6%Idl 624272 inact 11
16: bge
| | | | | | | | | | 41360 cache 133
19: ata
1656 free 2000
cpu0: time
daefr 2000
cpu1: time
Namei Name-cache Dir-cache prcfr
Calls hits % hits % react
6 6 100 pdwake
zfod 1354 pdpgs
Disks ad4 ad6 ozfod intrn
KB/t 125 126 %slo-z 113888 buf
tps 34 33 1407 tfree 17 dirtybuf
MB/s 4.13 4.10 69977 desiredvnodes
% busy 54 48 20661 numvnodes
17286 freevnodes
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