linux'un kullanim alanlari..

Gorkem Cetin (e077245@narwhal.cc.metu.edu.tr)
Mon, 20 Apr 1998 17:03:19 +0400 (MEDT)


Asagida, uzerinde agir islerinin yapildigi linux
makinalara ornekler verilmis. gunde 600,000 - 800,000 arasi
ziyaretci alan makinalara dikkatinizi cekerim.

iyi calismalar
gorkem

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Machine:
Pentium 90 Mhz
64MB RAM
2 * BT-946C PCI SCSI Adapter
2 * 9 GB HD,
2 * 15 GB DLT tape drives
2 100Mbit Ethernet ports
Software:
We have Amanda running on a Linux server backing up a network
of 35 unix machines with a total of 63 GB in 135 filesystems
getting compressed down to 28GB. Compression is done by each
client. The machine does a complete archival backup in 7:26:56
which is 1059kB/s from net to tape.

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Machine:
Dell PowerEdge 2200
Pentium II, 333 Mhz
256 MB RAM
4 HDs - a total of 16 GByte as RAID-0
Kernel:
2.0.33 (patched to deal with 3000 filedescriptors)
Software:
Squid Proxy
Throughput:
4.8 Mio requests (1.7 Mio TCP; 3.05 Mio UDP)
21,05 Gbytes transfer
Reqeuest/s: peak 182, average 95
(06.04.1998)

Problems:
filedescriptors, memory, memory leaks in squid

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[Comment: this web-site generates it's content out of a database.]

We had a 4 CPU 200Mhz PPro Compaq completely overworked at 500.000 hits.
When we installed the squid system we found the loads dropped to 30-40%.
We are now running a 2 CPU 200Mhz PPro clone that is beginning to get
up to about 80% utilization. We did some tests with load sharing using
squid's redirection capabilities and it worked just fine.

Squid manages to cache 70-75% of the http requests so dramatically
reduces the load on the apache servers dramaticaly.

INTERNET
=> Squid proxy server(accell mode)
=> Web server (apache + PHP/FI)
=> DB server(Solid)

All the systems are running with Dual 200Mhz Pentium Pro Clones. and
typicaly run at less than 50% capacity.

The following information is for out bussiest day. Typicaly we see 600K to
800K hits/day.

Total requests: 1080555 (45026 per hour)
Total errors: 8770 (365 per hour)

Total 4529.797 Mbytes ( 4.42 Gbytes )
Greatest object was 62.75 Kbytes:

These are from our Wusage stats for the same day.

Category Total
Unique sites served 18220
Unique documents served 2671
Total visits 31789
Average visit: 4.75 minutes
Longest visit: 127 minutes