multipathing
Hello All,
if you are connected to a SAN using fiber, how do you configure multipathing ?
I will truly appreciate any response.
Thank you
Arrey
Responses
Guru
6863 points
Depending on which version you are using (RHEL 5 or 6) I would review the DM multipath guide.
Google Search "multipath site:access.redhat.com"
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/DM_Multipath/
Once you have an understanding of the Red Hat documentation, I would then search the recommendations from your hardware vendor (IBM Storwize V7000 - for example)
Google Search "/etc/multipath.conf IBM V7000"
While completely endorsing Mr. Radtke's advice, a cheat sheet short version is:
- configure any transport daemons such as iscsi and iscsid or host adapters such as fiber channel
- configure the device manager for multipathing, updating the blacklist, multipath, and device paragraphs in /etc/multipath.conf
- assuming you use LVM, adjust the filter=... line in /etc/lvm/lvm.conf to include the multipath names and exclude the raw underlying devices
- all references to the exported storage in /etc/fstab or by pvcreate or parted etc. should use the /dev/mapper/XXX multipath names; never use any of the raw underlying devices directly
-- Jim Leinweber, WI State Lab of Hygiene
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.