From: Volkan Yazici (yazicivo@itu.edu.tr)
Date: Wed 17 Nov 2004 - 09:37:37 EET
merhaba,
kumeleme hakkinda pek fazla bir bilgim yok ama uyesi oldugum diger
bir listede "file system clustering" baslikli thread'de soyle bir link
verilmisti: http://www.drbd.org/. isinize yarayabilecegini dusundum.
{{{ What is DRBD
DRBD is a block device which is designed to build high availability
clusters. This is done by mirroring a whole block device via (a
dedicated) network. You could see it as a network raid-1.
}}}
{{{ How is DRBD related to current HA clusters?
To my knowledge most current HA clusters (HP, Compaq, ...) are using
shared storage devices, thus the storage devices are connected to more
than one node (This can be done with shared SCSI busses or Fibre
Channel).
DRBD gives you about the same semantics as a shared device, but it
does not need any uncommon hardware. It runs on top of IP networks,
which are to my impression less expensive than special storage
networks.
Currently DRBD grants read-write access only to one node at a time,
which is sufficient for the usual fail-over HA cluster. Although
it is currently not on my task list, it would not be a great effort
to allow both nodes read-write access. This would be useful with GFS
for example.
}}}
iyi calismalar.
On Fri, Nov 12, 2004 at 03:20:53PM +0200, emret wrote:
> 2 farkli yerde kullanmayi planliyorum. 1. firewall olarak çalýþan
> bir makinayi (ki asla down olmamasi gereken bir yerde) failover olarak
> çalýþtýrmak. 2si bir mail sunucusnda ham failover hemde yük daðýlýmý
> icin kullanmak. Duruma göre servis bazlýda olabilir. Ama mail sunucusu
> üzerinde asil iþi mail olsa bile farkli görevlerdede kullanilabilir
-------------------------------------------------
This mail sent through IMP: http://webmail.students.itu.edu.tr
_______________________________________________
Linux-sunucu mailing list
Linux-sunucu@liste.linux.org.tr
http://liste.linux.org.tr/mailman/listinfo/linux-sunucu