|
Your setup seems very interesting.
Just one question below...
-----Message d'origine-----
De: Atif Ghaffar [SMTP:atif@xxxxxxxxxxxx]
Date: samedi 3 juin 2000 15:23
À: Andi Hechtbauer
Cc: tc lewis; Joseph Mack; pu@xxxxxxxxxx; lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Objet: Re: Network Block Device w/ RAID for Content Replication (Was: Re: load
balance web site)
...
There are 6 frontend servers that are running apache, php3 modperl etc.
each with 2 9 gb disk.
the first 9gb disk is for system (/boot, / etc)
the second 9gb disk is /www this disk is running software raid 1
with the nbd that is mounted from the main file servers.
[Nicolas Huillard] I don't understand how the frontend server's second disk
are managed :
* do they see a RAID 1 array (can you remind me what is RAID 1 ?) with a local
9GB SCSI disk and a distant nbd disk ? In this case, the back-end servers will
have to manage 6 disk for the 6 front-ends ?
* or is it the back-ends that have a RAID array, consisting on a local disk and
6 distant nbd disks (one for each front-end), in order for them to see the
content, read-only, on their local disk ?
Last question : how do you manage MySQL fail-over between the two back-ends ?
TIA,
Nicolas Huillard
|
