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> I've been asked by a local ISP for suggestions in configuring a news
> server under Digital UNIX. Specifically I am looking for suggestions
> in terms of:
you might contact some folks in ibg...you might
try [email protected] as I know she has been involved in tuning
news servers.
>
> 1. filesystem --- Advfs or UFS
you can use either one. I generally prefer advfs, but one
needs to be a little more careful in initial setup and ongoing
operation.
Generally:
- if possible use storage with non volatile WBC like HSZ50s or
SWCXR (with proper batteries).
- Keep each volume given to advfs to be around 4-5GB or less
- If you need a bigger domain, use multiple volumes, or
multiple domains
- enable the WBC on the volumes, for hszs ensure the max transfer
size is set big (> 128KB)
- run defragment and balance regularly on each domain (i suggest
once a week).
- use V4.0B of Digital unix.
> 2. tuning tips for filesystem
run sys_check
http://www-unix.zk3.dec.com/tuning/tools/sys_check/sys_check.html
size the BMT extent size (mkfdmn -x -p or addvol -x -p) to
2048.
> 3. storage subsystem configuration
> - RAID level
depends on load...if write load is real heavy, use RAID1
If caches are working well, you might get away with RAID5
> - HW versus SW RAID
use LSM, regardless of where the raid is done...this will make
mgmt (and tuning) much easier as we will have much better statistics
to monitor.
since it is a single system, use the hardware raid (on hsz50 or
swxcr)...but ensure each device is given to LSM to give to the file
system.
>
> BTW, the platform is an AlphaServer 1000.
>
>
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