[Linux-ha-dev] CTDB and clustered Samba

2007-06-11 Thread tridge
Folks, I thought some of you may be interested in http://ctdb.samba.org/, which describes the newly developed CTDB system for clustering Samba. While developed with Samba in mind, CTDB can also be used in combination with a cluster filesystem to provide HA failover for a wide range of services. W

Re: [Linux-ha-dev] CTDB and clustered Samba

2007-06-12 Thread Lars Marowsky-Bree
On 2007-06-12T14:23:15, [EMAIL PROTECTED] wrote: > Folks, > > I thought some of you may be interested in http://ctdb.samba.org/, > which describes the newly developed CTDB system for clustering Samba. Tridge, that is indeed very interesting! Thanks for reminding me to investigate that. I have r

Re: [Linux-ha-dev] CTDB and clustered Samba

2007-06-12 Thread tridge
Lars, > CTDB is built on top of a cluster filesystem layer. not quite - CTDB relies on one being there, but doesn't actually use it much itself. CTDB opens exactly 1 file on the cluster fs, that file never has any data in it, and CTDB holds exactly 1 byte of lock on that file on one of the nodes

Re: [Linux-ha-dev] CTDB and clustered Samba

2007-06-12 Thread Lars Marowsky-Bree
On 2007-06-12T20:42:31, [EMAIL PROTECTED] wrote: > > CTDB is built on top of a cluster filesystem layer. > not quite - CTDB relies on one being there, but doesn't actually use > it much itself. CTDB opens exactly 1 file on the cluster fs, that file > never has any data in it, and CTDB holds exact

Re: [Linux-ha-dev] CTDB and clustered Samba

2007-06-12 Thread tridge
Lars, > OK. So you're using the CFS as a DLM. Expensive, but possible. ;-) no, the DLM in CTDB is on our own transport. The single lock is gained once when a node becomes the recovery master. That means one lock every few days in a typical setup, which is hardly expensive! > (That also means t