Using ZFS Replication-opracowanie

Using ZFS Replication
To support high availability environments, providing an instant copy of the information on both the
currently active machine and the hot backup is a critical part of the HA solution. There are many
solutions to this problem, including Chapter 16, Replication and Section 15.2, “Overview of MySQL with
DRBD/Pacemaker/Corosync/Oracle Linux”.
The ZFS file system provides functionality to create a snapshot of the file system contents, transfer
the snapshot to another machine, and extract the snapshot to recreate the file system. You can create
a snapshot at any time, and you can create as many snapshots as you like. By continually creating,
transferring, and restoring snapshots, you can provide synchronization between one or more machines
in a fashion similar to DRBD.
The following example shows a simple Solaris system running with a single ZFS pool, mounted at /
scratchpool:
Filesystem size used avail capacity Mounted on
/dev/dsk/c0d0s0 4.6G 3.7G 886M 82% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 1.4G 892K 1.4G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
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