Using a large number of LUNs and/or paths with MPIO
This document (7008051) is provided subject to the disclaimer at the end of this document.
SUSE Linux Enterprise Server 11 Service Pack 1
multipathd: error creating pipe for callout: Too many open files
As a general rule of thumb, there should be two available file descriptors per path. For example, if 1000 LUNs were available through 4 paths each, multipathd would need 8000 open file descriptors (#LUNs x #paths x 2).
To increase the maximum number of file descriptors, the following entry must be place in /etc/multipath.conf:
Note - It is very common for no /etc/multipath.conf file to exist. In this case, create the file using only the configuration option listed above. Otherwise, add the max_fds setting to the 'defaults' section of the existing multipath.conf file. If the server is booting from the SAN, run `mkinitrd` to ensure the new multipath.conf is added to the initrd.
After modifying (or creating) the /etc/multipath.conf file, restart multipathd to cause the setting to take effect.
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- Document ID:7008051
- Creation Date: 04-Mar-2011
- Modified Date:03-Mar-2020
- SUSE Linux Enterprise Server
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