David Rees wrote:
> On 3/26/07, Evren Yurtesen <[EMAIL PROTECTED]> wrote:
>>> And, you could consider buying a faster drive, or one with a larger
>>> buffer. Some IDE drives have pathetically small buffers and slow
>>> rotation rates. That makes for a greater need for seeking, and worse
>>> seek performance.
>> Well this is a seagate barracuda 7200rpm drive with 8mb cache ST3250824A
>> http://www.seagate.com/support/disc/manuals/ata/100389997c.pdf
>
> Same drive as I'm using, except mine are in RAID1 which doubles random
> read performance.
>
>> I read your posts about wifi etc. on forum. The processor is not the
>> problem however adding memory probably might help bufferwise. I think
>> this idea can actually work.:) thanks! I am seeing swapping problems but
>> the disk the swap is on is almost idle. The backup drive is working all
>> the time.
>
> Please show us some more real data showing CPU utilization while a
> backup is running. Please also give us the real specs of the machine
> and what other jobs the machine performs.
>
>> I have to say that slow performance with BackupPC is a known problem. I
>> have heard it from several other people who are using BackupPC and it is
>> the #1 reason of changing to another backup program from what I hear.
>>
>> Things must improve on this area.
>
> There are plenty of ways to speed up BackupPC. It really isn't slow in
> my experience.
>
> But you must tell us what you are actually doing and what is going on
> with your server for us to help instead of repeatedly saying "it's
> slow, speed it up".
>
> -Dave
>
It is the disk reads...
/dev/ad2s1d on /usr/local/backuppc/data (ufs, local, noatime,
soft-updates, writes: sync 19230 async 59251870, reads: sync 429504630
async 3064337)
Lets hope this doesnt wrap around... as you can see load is in 0.1-0.01
range.
1 users Load 0.12 0.05 0.01 Mar 27 07:30
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 26020 3592 144912 6868 12384 count
All 249784 5456 2327896 11800 pages
Interrupts
Proc:r p d s w Csw Trp Sys Int Sof Flt cow 307 total
1 9 49 617 2 659 410 7 59556 wire
6: fdc0
27880 act 128
8: rtc
3.1%Sys 0.0%Intr 0.0%User 0.0%Nice 96.9%Idl 151740 inact
13: npx
| | | | | | | | | | 11732 cache
14: ata
== 652 free 75
15: ata
daefr 4
21: rl0
Namei Name-cache Dir-cache prcfr 100 0: clk
Calls hits % hits % react
336 32 10 pdwake
zfod pdpgs
Disks ad0 ad2 ozfod intrn
KB/t 0.00 13.61 %slo-z 35568 buf
tps 0 75 262 tfree 3 dirtybuf
MB/s 0.00 1.00 17747 desiredvnodes
% busy 0 96 17772 numvnodes
8637 freevnodes
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