OCFS2

WHAT IS OCFS2?

OCFS2 is the next generation of the Oracle Cluster File System for Linux. It allows you to mount volumes on different hosts at the same time. It is an extent based, POSIX compliant file system. OCFS2 is a general-purpose file system that can be used for shared Oracle home installations making management of Oracle Real Application Cluster (RAC) installations even easier. Among the new features and benefits are:

Node and architecture local files using Context Dependent Symbolic Links (CDSL) Network based pluggable DLM Improved journaling / node recovery using the Linux Kernel "JBD" subsystem Improved performance of meta-data operations (space allocation, locking, etc). Improved data caching / locking (for files such as oracle binaries, libraries, etc)

Installimine on lihtne, eriti RedHatiga ;)

Vaadake, millise kerneli jaoks ka tõmbate ;)

wget http://oss.oracle.com/projects/ocfs2/dist/files/RedHat/RHEL4/x86_64/1.2.5-1/2.6.9-42.EL/ocfs2-2.6.9-42.ELsmp-1.2.5-1.x86_64.rpm

wget http://oss.oracle.com/projects/ocfs2-tools/dist/files/RedHat/RHEL4/x86_64/1.2.4-1/ocfs2-tools-1.2.4-1.x86_64.rpm

wget http://oss.oracle.com/projects/ocfs2-tools/dist/files/RedHat/RHEL4/x86_64/1.2.4-1/ocfs2console-1.2.4-1.x86_64.rpm

rpm -i ocfs2*

Kes tahab sortsust kokku lasta, siis selleks ka võimalus
http://oss.oracle.com/projects/ocfs2/files/source/

Et kõik moodulid masina buutimisel üles laetakse, tuleb käivitada

/etc/init.d/o2cb configure
/etc/init.d/o2cb load
chkconfig ocfs2 on
chkconfig o2cb on

Oracle on valmis teinud ka kena GUI "ocfs2console", võimalusel kasutage seda

Kõigepealt teeme klastri, lisame masinad

confifailid asuvad /etc/ocfs2/cluster.conf ja /etc/sysconfig/o2cb

cat /etc/ocfs2/cluster.conf

node:
       ip_port = 7777
       ip_address = 10.1.5.196
       number = 0
       name = nfs1
       cluster = ocfs2

node:
       ip_port = 7777
       ip_address = 10.1.5.197
       number = 1
       name = nfs2
       cluster = ocfs2

cluster:
       node_count = 2
       name = ocfs2

cat /etc/sysconfig/o2cb 

# This is a configuration file for automatic startup of the O2CB

# driver.  It is generated by running /etc/init.d/o2cb configure.

# Please use that method to modify this file

# O2CB_ENABELED: 'true' means to load the driver on boot.

O2CB_ENABLED=true
# O2CB_BOOTCLUSTER: If not empty, the name of a cluster to start.

O2CB_BOOTCLUSTER=ocfs2
# O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is considered dead.

O2CB_HEARTBEAT_THRESHOLD=
# O2CB_IDLE_TIMEOUT_MS: Time in ms before a network connection is considered dead.

O2CB_IDLE_TIMEOUT_MS=
# O2CB_KEEPALIVE_DELAY_MS: Max time in ms before a keepalive packet is sent

O2CB_KEEPALIVE_DELAY_MS=
# O2CB_RECONNECT_DELAY_MS: Min time in ms between connection attempts

O2CB_RECONNECT_DELAY_MS=

ocfs2 failisüsteemi tegemiseks kettale on käsk mkfs.ocfs2, võib GUI-s

et mountida ketast võib kasutada GUI'd või mount -t ocfs2 /dev/xxx /xxx või kõik ocfs2 kettad mount -at ocfs2

Kui mõlemas masinas ettevalmistused tehtud, siis polegi midagi muud jäänud kui:

/etc/init.d/o2cb online ocfs2

alati saab ka staatust vaadata

/etc/init.d/o2cb status

Kui klaster on confitud buutimisel laadima, saab klastrit startida/peatada /etc/init.d/o2cb start/stop

Täpsem õpetus http://oss.oracle.com/projects/ocfs2/dist/documentation/02-mount_umount.pdf