HP StorageWorks Scalable File Share System Installation and Upgrade Guide Version 2.2

Upgrading client nodes and servers to new version 8–15
8.3.18Step 18: Starting the file systems
NOTE: You will not be able to start the file systems until you have installed the license file, as described in
Section 8.3.15.
When you are satisfied that all of the servers in the HP SFS system and all of the client nodes have been
upgraded successfully, start the file systems again. When the upgrade process is complete, all file systems
will be in the stopped state.
When you are starting the file systems immediately after upgrading, you must start the file systems one by
one, and wait for the MDS service on one file system to go to the running state before you start the next
file system. The reason for this is that if more than one file system is started at the same time, the MDS service
on a file system may stay in the load-stalled state even when the OST services move to the running
state.
If an MDS service stays in the load-stalled state for more than 10 minutes after you have started a file
system (following a system upgrade), reboot the MDS server.
To start a file system, perform the following steps:
1. Enter the command shown in the following example, where the data file system is started:
sfs> start filesystem data
2. Verify that the file system has started, as follows:
sfs> show filesystem data
Name: data
OSTs: ost[4-6]
State: started
.
.
.
Repeat these steps for each file system.
When all file systems have restarted successfully, proceed to Section 8.3.19 to modify service mount options
and enable quota functionality (this step is optional).
8.3.19Step 19: Modifying service mount options and enabling quotas (optional)
Underlying the OST and MDS services on the Lustre file systems, there are ldiskfs file systems. When an
OST or MDS service starts, it mounts the underlying ldiskfs file system so that it can access the data. You
can specify mount options on these file systems to determine what happens when the file systems are
mounted.
In HP SFS Version 2.2, the extents and the mballoc mount options are supported for OST services:
• Enabling the extents option on a file system’s underlying OST services improves the performance of
the file system; for this reason, the default when creating a file system is to enable this option on OST
services. HP recommends that you enable the extents mount option on a file system’s underlying
OST services only—do not enable this mount option on MDS services. If the extents option is not
already enabled on your file systems, you can enable the option manually, using the modify
filesystem command.
• The setting for the mballoc option is determined by the file I/O pattern specified for the file system
(when a file system is created in HP SFS Version 2.2). Do not change the setting for the mballoc
option on an existing file system.
In HP SFS Version 2.2, the acl and user_xattrs options are supported for MDS services:
• The acl option must be enabled if Access Control Lists are to be used when the file system is mounted
on client nodes.
• The user_xattrs option must be enabled if extended attributes are to be used when the file system
is mounted.