Re: Software Raid 5
"Brown, Larry" <[email protected]>
| Newsgroups | gmane.linux.cluster.ssic.user |
|---|---|
| Message-ID | <519DADD61DAACF4D97B777D0C2BA487D02230993@nmr001oldmsx09.enterprisenet.org> |
How does OpenSSI handle the fail over on shared hardware? Is the redundant master mounting read only until the current master fails and then re-mounts? Does each mount rw and OpenSSI prevents the fail over machine from writing until the failure of the current master? Larry Brown -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Alexander (Sasha) Wait Sent: Monday, June 19, 2006 4:25 PM To: [email protected] Subject: Re: [SSI-users] Software Raid 5 On 6/19/06, Brown, Larry <[email protected]> wrote: > AOE stands for ATA over Ethernet. There is a kernel driver that sets > up a drive as /dev/etherd/eX.Y where X is a shelf the actual drive is > designated to be on and Y is the drive within that shelf you are > addressing. The communication for reads/writes is done over Ethernet > and so you can have raid over the network where two drives are on > different racks / power supplies etc. > RAID5 is pretty slow--even with hardware assist--I can't imagine it would be any fun over ethernet. But what about software mirroring over ethernet? iSCSI is a pretty standard way to get Xen clusters booted diskless. And I suppose you could probably do software mirroring this way. People on the list have probably done it (with or without OpenSSI.) Anyone? Sasha -- http://freelogy.org/wiki/User:AlexanderWait (GnuPG ID 4153C516) _______________________________________________ Ssic-linux-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ssic-linux-users All the advantages of Linux Managed Hosting--Without the Cost and Risk! Fully trained technicians. The highest number of Red Hat certifications in the hosting industry. Fanatical Support. Click to learn more http://sel.as-us.falkag.net/sel?cmd=lnk&kid=107521&bid=248729&dat=121642