DRBD is a low-cost shared-SAN-like solution, which has several great benefits, among which are no single point of failure, and very low cost (local storage and network cable). Its main disadvantages are in the need to constantly monitor it, and make sure it does what’s expected. Also – in some cases – performance might be affected greatly….
Oracle begin to push their Clusterware as a 3rd party HA framework. In this article we will review a quick example of how to do it. I will refer to this post as a quick-guide, as this is by no means any full-scale guide. This article assumes you have installed Oracle Clusterware following one of…
Working with RH Cluster quite a lot, I have decided to create an online store of customer agents/scripts. I have not, so far, invested the effort of making these agents accept settings from the cluster.conf file, but this might happen. Let the library be! Oracle DB script/agent: Although I discovered (a bit late) that RH…
Redhat Cluster is a nice HA product. I have been implementing it for a while now, lecturing about it, and yes – I like it. But like any other software product, it has few flaws and issues which you should take under consideration – especially when you create custom “agents” – plugins to control (start/stop/status)…
I encountered an interesting bug/feature of RHCS on RHEL4. A snip of my configuration looks like this: <resources> <fs device=”/dev/mapper/mpath6p1″ force_fsck=”1″ force_umount=”1″ fstype=”ext3″ name=”share_prd” mountpint=”/share_prd” options=”” self_fence=”0″ fsid=”02001″/> <nfsexport name=”nfs export4″/> <nfsclient name=”all ro” target=”192.168.0.0/255.255.255.0″ options=”ro,no_root_sqush,sync”/> <nfsclient name=”app1″ target=”app1″ options=”rw,no_root_squash,sync”/> </resources> <service autostart=”1″ domain=”prd” name=”prd” nfslock=”1″> <fs ref=”share_prd”> <nfsexport ref=”nfs export 4″> <nfsclient ref=”all ro”/>…
Using udev to set persistent raw devices for iscsi in Oracle RAC
