GPFS: Administration and Programming Reference - IRA Home

Table 2. Configuration attributes on the mmchconfig command (continued)
Attribute name and Description -i option
allowed
maxFilesToCache
Number of inodes to cache for recently
used files
maxMBpS
I/O throughput estimate
maxStatCache
Number of inodes to keep in stat cache
nsdServerWaitTimeForMount
Number of seconds to wait for an NSD
server to come up
nsdServerWaitTimeWindowOnMount
Time window to determine if quorum is
to be considered recently formed
pagepool
Size of buffer cache on each node
prefetchThreads
Maximum number of threads dedicated
to prefetching data
subnets
List of subnets to be used for most
efficient daemon-to-daemon
communication
tiebreakerDisks
List of tie breaker disks (NSDs)
uidDomain
The UID domain name for the cluster.
unmountOnDiskFail
Unmount the file system on a disk
failure
worker1Threads
maximum number of concurrent file
operations
-I option
allowed
GPFS must
be stopped
on all
nodes
List of
NodeNames
allowed
Change takes
effect
no no no yes restart of the
daemon
yes yes no yes if not immediately,
on restart of the
daemon
no no no yes restart of the
daemon
yes yes no yes if not immediately,
on restart of the
daemon
yes yes no yes if not immediately,
on restart of the
daemon
yes yes no yes if not immediately,
on restart of the
daemon
no no no yes restart of the
daemon
no no no no restart of the
daemon
no no yes no restart of the
daemon
no no yes no restart of the
daemon
yes yes no yes if not immediately,
on restart of the
daemon
no no no yes restart of the
daemon
Specify the nodes you want to target for change and the attributes with their new values on the
mmchconfig command. For example, to change the pagepool value for each node in the GPFS cluster
immediately, enter:
mmchconfig pagepool=100M -i
Chapter 2. Managing your GPFS cluster 9