CXFS supports a running cluster with a single type of operating system for administration nodes: either all IRIX or all Linux 64-bit. To migrate from an IRIX cluster to a Linux cluster, do the following:
 | Note: The following procedure assumes that the filesystems in the cluster you want to migrate do not have block sizes greater than the system page size and that they are not real-time filesystems. These types of filesystems are supported on IRIX but not on Linux 64-bit. |
The example in this chapter begins with a cluster named performance having a two IRIX server-capable nodes named rum and snake and a Solaris client-only node named ray:
rum # clconf_info Event at [2004-02-13 07:57:17] Membership since Thu Feb 12 15:15:26 2004 Node NodeId Status Age Incarnation CellId snake 1 UP 2 0 1 rum 2 UP 2 0 2 ray 3 UP 1 0 0 1 CXFS FileSystems /dev/cxvm/V9500 on /cxfs/V9500 enabled server=(snake) 2 client(s)=(ray,rum) status=UP |
Unmount the CXFS filesystems. For example, on the IRIX node rum:
cmgr> admin cxfs_unmount cxfs_filesystem V9500 cxfs_unmount operation successful
Stop CXFS services on all nodes. For example on the IRIX node rum:
cmgr> stop cx_services for cluster performance CXFS services have been deactivated in cluster performance
Define the administration node with the Linux operating system type. For example on the IRIX node rum:
cmgr> define node bang Enter commands, you may enter "done" or "cancel" at any time to exit Hostname[optional] ? bang Is this a FailSafe node <true|false> ? false Is this a CXFS node <true|false> ? true Operating System <IRIX|Linux32|Linux64|AIX|HPUX|Solaris|MacOSX|Windows> ? Linux64 Node Function <server_admin|client_admin|client_only> ? server_admin Node ID[optional] ? 64 Partition ID[optional] ? (0) Do you wish to define failure hierarchy[y/n]:y Hierarchy option 0 <System|FenceReset|Fence|Reset|Shutdown>[optional] ? Fence Hierarchy option 1 <System|FenceReset|Fence|Reset|Shutdown>[optional] ? Reset type <powerCycle|reset|nmi> ? (powerCycle) Do you wish to define system controller info[y/n]:n Number of Network Interfaces ? (1) NIC 1 - IP Address ? bang-p NIC 1 - Heartbeat HB (use network for heartbeats) <true|false> ? true NIC 1 - (use network for control messages) <true|false> ? true NIC 1 - Priority <1,2,...> ? 1 Successfully defined node bang
Add the Linux administration node to the cluster. For example on the IRIX node rum:
cmgr> modify cluster performance Enter commands, you may enter "done" or "cancel" at any time to exit Is this a FailSafe cluster <true|false> ? (false) Is this a CXFS cluster <true|false> ? (true) Cluster Notify Cmd [optional] ? Cluster Notify Address [optional] ? Cluster CXFS mode <normal|experimental>[optional] ? (normal) Cluster ID ? (1) Current nodes in cluster performance: Node - 1: ray Node - 2: snake Node - 3: rum No networks in cluster performance Add nodes to or remove nodes/networks from cluster performance Enter "done" when completed or "cancel" to abort performance ? add node bang performance ? done Added node <bang> to cluster <performance> Successfully modified cluster performance
Modify the CXFS filesystems to remove the IRIX administration nodes as metadata servers and add the new Linux administration node as metadata server. For example, on the IRIX node rum:
cmgr> modify cxfs_filesystem V9500 (Enter "cancel" at any time to abort) Device ? (/dev/cxvm/V9500) Mount Point ? (/cxfs/V9500) Mount Options[optional] ? Use Forced Unmount ? <true|false> ? (false) Grio Qualififed Bandwidth[optional] ? Grio managed filesystem ? <true|false>[optional] ? Default Local Status ? (enabled) MODIFY CXFS FILESYSTEM OPTIONS 0) Modify Server. 1) Add Server. 2) Remove Server. 3) Add Enabled Node. 4) Remove Enabled Node. 5) Add Disabled Node. 6) Remove Disabled Node. 7) Show Current Information. 8) Cancel. (Aborts command) 9) Done. (Exits and runs command) Enter option:2 Current servers: CXFS Server 1 - Rank: 0 Node: rum CXFS Server 2 - Rank: 1 Node: snake Server Node ? rum 0) Modify Server. 1) Add Server. 2) Remove Server. 3) Add Enabled Node. 4) Remove Enabled Node. 5) Add Disabled Node. 6) Remove Disabled Node. 7) Show Current Information. 8) Cancel. (Aborts command) 9) Done. (Exits and runs command) Enter option:2 Current servers: CXFS Server 1 - Rank: 1 Node: snake Server Node ? snake 0) Modify Server. 1) Add Server. 2) Remove Server. 3) Add Enabled Node. 4) Remove Enabled Node. 5) Add Disabled Node. 6) Remove Disabled Node. 7) Show Current Information. 8) Cancel. (Aborts command) 9) Done. (Exits and runs command) Enter option:1 No current servers Server Node ? bang Server Rank ? 1 0) Modify Server. 1) Add Server. 2) Remove Server. 3) Add Enabled Node. 4) Remove Enabled Node. 5) Add Disabled Node. 6) Remove Disabled Node. 7) Show Current Information. 8) Cancel. (Aborts command) 9) Done. (Exits and runs command) Enter option:9 Successfully modified cxfs_filesystem V9500
After you complete this step, the filesystems would show the following information:
cmgr> show cxfs_filesystem V9500 Name: V9500 Device: /dev/cxvm/V9500 Mount Point: /cxfs/V9500 Forced Unmount: false Global Status: disabled Default Local Status: enabled Server Name: bang Rank: 1
Remove the IRIX administration nodes from the cluster. For example, switching to the Linux 64-bit node bang:
cmgr> modify cluster performance Enter commands, you may enter "done" or "cancel" at any time to exit Is this a FailSafe cluster <true|false> ? (false) Is this a CXFS cluster <true|false> ? (true) Cluster Notify Cmd [optional] ? Cluster Notify Address [optional] ? Cluster CXFS mode <normal|experimental>[optional] ? (normal) Cluster ID ? (1) Current nodes in cluster performance: Node - 1: ray Node - 2: snake Node - 3: rum Node - 4: bang Add nodes to or remove nodes/networks from cluster performance Enter "done" when completed or "cancel" to abort performance ? remove node rum performance ? remove node snake performance ? done Successfully modified cluster performance
Delete the IRIX administration nodes from the pool. For example, from the Linux 64-bit node bang:
cmgr> delete node rum Deleted node (rum). cmgr> delete node snake Deleted node (snake).
Start CXFS services for all nodes in the cluster. For example, from the Linux 64-bit node bang:
cmgr> start cx_services for cluster performance CXFS services have been activated in cluster performance
Mount the CXFS filesystems. For example, from the Linux 64-bit node bang:
cmgr> admin cxfs_mount cxfs_filesystem V9500 cxfs_mount operation successful
After completing this procedure, the cluster information is as follows:
[root@bang root]# clconf_info Event at [2004-02-13 08:44:18] Membership since Fri Feb 13 08:44:13 2004 Node NodeId Status Age Incarnation CellId ray 3 UP 1 0 0 bang 64 UP 1 0 3 1 CXFS FileSystems /dev/cxvm/V9500 on /cxfs/V9500 enabled server=(bang) 1 client(s)=(ray) status=UP |
For more information about using the cmgr command to perform this procedure, see the following:
For more information about using the GUI, see the following: