Hi Man,
Linux Man wrote:
Thanks for you help
Well, I'll use it for cache web traffic, thus save bandwidth.
The cache dir will have 50 GB, and the linux box 2 GB RAM.
I think that while coss is under development, diskd is a good
alternative, so that is will I use.
Which Squid version and Operating system is your Squid cache running on?
From my experience with COSS, I don't think that COSS is unstable, at
least for my Squid caches. Below is the status of one of my Squid cache
using COSS.
[root@cache8 ~]# squidclient mgr:info
HTTP/1.0 200 OK
Server: squid
Date: Thu, 10 Jan 2008 15:17:39 GMT
Content-Type: text/plain
Expires: Thu, 10 Jan 2008 15:17:39 GMT
Last-Modified: Thu, 10 Jan 2008 15:17:39 GMT
X-Cache: MISS from cache8.myhost.com
X-Cache-Lookup: MISS from cache8.myhost.com:3128
Via: 1.0 cache8.myhost.com:3128 (squid)
Proxy-Connection: close
Squid Object Cache: Version 2.6.STABLE16
Start Time: Sun, 09 Sep 2007 11:31:49 GMT
Current Time: Thu, 10 Jan 2008 15:17:39 GMT
Connection information for squid:
Number of clients accessing cache: 5458
Number of HTTP requests received: 646905419
Number of ICP messages received: 3418793728
Number of ICP messages sent: 3443241002
Number of queued ICP replies: 1725
Request failure ratio: 0.00
Average HTTP requests per minute since start: 3647.7
Average ICP messages per minute since start: -9743.1
Select loop called: 1343923409 times, 7.918 ms avg
Cache information for squid:
Request Hit Ratios: 5min: 30.4%, 60min: 35.5%
Byte Hit Ratios: 5min: 13.2%, 60min: 17.8%
Request Memory Hit Ratios: 5min: 0.5%, 60min: 0.5%
Request Disk Hit Ratios: 5min: 64.0%, 60min: 62.2%
Storage Swap size: 7539358 KB
Storage Mem size: 62772 KB
Mean Object Size: 8.74 KB
Requests given to unlinkd: 0
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 1.24267 1.24267
Cache Misses: 1.54242 1.46131
Cache Hits: 0.01164 0.01035
Near Hits: 1.24267 1.31166
Not-Modified Replies: 0.00179 0.00091
DNS Lookups: 0.00190 0.00190
ICP Queries: 0.00108 0.00108
Resource usage for squid:
UP Time: 10640749.431 seconds
CPU Time: 776356.607 seconds
CPU Usage: 7.30%
CPU Usage, 5 minute avg: 0.00%
CPU Usage, 60 minute avg: 0.00%
Process Data Segment Size via sbrk(): 1267032 KB
Maximum Resident Size: 558596 KB
Page faults with physical i/o: 7602194
Memory accounted for:
Total accounted: 635652 KB
memPoolAlloc calls: 1433656781
memPoolFree calls: 1427221210
File descriptor usage for squid:
Maximum number of file descriptors: 8192
Largest file desc currently in use: 1659
Number of file desc currently in use: 1444
Files queued for open: 0
Available number of file descriptors: 6748
Reserved number of file descriptors: 100
Store Disk files open: 0
IO loop method: kqueue
Internal Data Structures:
863282 StoreEntries
1952 StoreEntries with MemObjects
1215 Hot Object Cache Items
862395 on-disk objects
As you can see from the above stats, this cache utilizing the COSS
storage scheme has been running up without downtime since 09-Sep-2007!
With an average of 13KB is a good choice a block size of 4KB?
I suggest using 2 cache directories schemes for your Squid box. The 1st
for COSS and the 2nd for AUFS or DISKD.
But I think that AUFS is more suitable for Linux though.
Thanking you...
Thanks a lot
Best regards
2008/1/8, Matus UHLAR - fantomas <uhlar@xxxxxxxxxxx>:
On 08.01.08 00:42, Linux Man wrote:
In your experience, when you make a new fs (I will use ext3) for cache
dir, what block-size and inode ratio do you use?
depends on usage, but the average file size is usually around 13KB which may
tell enough...
using COSS for small files should change this a lot, however COSS is still
not stable enough iirc
--
Matus UHLAR - fantomas, uhlar@xxxxxxxxxxx ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
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--
With best regards and good wishes,
Yours sincerely,
Tek Bahadur Limbu
System Administrator
(TAG/TDG Group)
Jwl Systems Department
Worldlink Communications Pvt. Ltd.
Jawalakhel, Nepal
http://www.wlink.com.np
http://teklimbu.wordpress.com
