Veritas Dynamic Multi-Pathing (DMP) provides the multi-pathing capability to the native devices on the system. DMP creates DMP metadevices (DMP nodes) to represent all the device e paths to the same physical LUN. How DMP works - VxVM uses the DMP metanodes (DMP nodes) to access disk devices connected to the system. For each disk, DMP maps one node to the set of paths that are connected to the disk. The raw and block devices are created in directories /dev/vx/rdmp and /dev/vx/dmp … [Read more...] about A beginners guide to Veritas Dynamic Multipathing (VxDMP)
Archives for February 2014
How to assign CPU/Memory/MAU resources to Guest LDOMs [OVM for SPARC]
The CPU, Memory and MAU resources can be added/removed dynamically to/from the guest LDOMs. Before adding the resources to guest LDOMs make sure you check the available resources in the primary domain : # ldm ls -o memory # ldm ls -o cpu # ldm ls -o mau Resources and their meanings The various resources and their meanings : AbbreviationNamePurpose VCPUvirtual CPUEach thread of a T series CPU acts as a virtual CPU MAUMathematical arithmetic unitEach core of T series CPU will have a … [Read more...] about How to assign CPU/Memory/MAU resources to Guest LDOMs [OVM for SPARC]
How to add/remove vdisk to/from Guest LDOMS online
Prerequisites In order to add vdisk online to a guest LDOM, the SMF service svc:/platform/sun4v/drd must be online in Guest LDOM : ldom01 # svcs drd STATE STIME FMRI online Feb_12 svc:/platform/sun4v/drd:default 1. Adding ZFS volume primary # zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT ldom 86.5G 14.6G 71.9G 16% 1.00x ONLINE - rpool 136G 20.5G 115G 15% 1.00x ONLINE - primary # zfs create -V 5G ldom/disk2 primary # ldm add-vdsdev /dev/zvol/dsk/ldom/disk2 … [Read more...] about How to add/remove vdisk to/from Guest LDOMS online
How to rename a LDOM (OVM for SPARC)
In some rare situations you may get a request to change the name of the LDOM. This can be done in 2 ways. 1. Using live migration (can be done online) 2. By editing XML constraints file (requires downtime) Using live migration feature (online) In this case we migrate the guest LDOM to another machine and then again migrate it to the original machine with the new name. source-machine # ldm migrate oldname destination-machine destination-machine # ldm migrate oldname … [Read more...] about How to rename a LDOM (OVM for SPARC)
How to enable Solaris multipathing (MPxIO or STMS) for EMC Symmetrix LUNs
A beginners guide to Solaris Multipathing Software (MPxIO or STMS) Oracle Solaris Storage Multipathing MPxIO provides multipath access to storage luns by grouping together the physical paths and presenting a single logical path. MPxIO can also be referred as STMS or SCSI_VHCI due to the commands used and logical device paths created. The post describes the step by step procedure to enable MPxIO for EMC Symmetrix LUNs. For Solaris 8/9 Set the configuration parameters in the … [Read more...] about How to enable Solaris multipathing (MPxIO or STMS) for EMC Symmetrix LUNs
A beginners guide to Solaris Multipathing Software (MPxIO or STMS)
Oracle Solaris Storage Multipathing MPxIO provides multipath access to storage luns by grouping together the physical paths and presenting a single logical path. MPxIO can also be referred as STMS or SCSI_VHCI due to the commands used and logical device paths created. Configuration files For Solaris 10 and earlier /kernel/drv/fp.conf Fiber channel port configuration file (For Fiber Channel Devices) /kernel/drv/mpt.conf mpt scsi/SAS HBA controller driver configuration file … [Read more...] about A beginners guide to Solaris Multipathing Software (MPxIO or STMS)