10 More Discussions You Might Find Interesting
1. Filesystems, Disks and Memory
hi! i got a rhel 6.3 host that already have an xfs filesystem mounted from a SAN (let's call it SAN-1) whose size is 9TB.
i will be receiving another SAN (let's call it SAN-2) storage of 15TB size. this new addition is physically on another SAN storage. SAN-1 is on a Pillar storage while the new... (6 Replies)
Discussion started by: rino19ny
6 Replies
2. AIX
Hi Experts,
I have configured A D40 Array. There is an faulty disk which is not part of an raid volume but shows fault in the diagnostics.
pdisk15 U0.1-P1-I1/Q1-W40AA83CC2400D
SSA160 Physical Disk Drive ( MB)
Is there a way to stop this... (2 Replies)
Discussion started by: vuppala360
2 Replies
3. AIX
Hi All,
What's the proper procedure for removing SSA arrays? Is the procedure like these?
- rmdev ssa disk
- physical turn off the ssa
- cfgmgr
There's no more filesystem or logical volume on it. It's just pdisk and hdisk.
Thanks in advance,
itik (3 Replies)
Discussion started by: itik
3 Replies
4. AIX
Hi guys,
I'd like to share my migration/mirroring of ssa to san. No downtime for users, probably I/O performance.
here's the step:
1 After the lun had been carved on the SAN and the connections had been done on AIX fiber card
2 “lspv” and look for the new SAN hdisk? on the bottom, say... (1 Reply)
Discussion started by: itik
1 Replies
5. Linux
Dear Srs,
I have a Linux server (linux01) booting from SAN with a volume in a Nexsan SATAbeast storage array (san01). The disk/volume has four ext3 partitions, total size is near to 400GB, but only 20-30GB are in use.
I need to move this disk/volume to another Nexsan SATAbeast storage array... (0 Replies)
Discussion started by: Santi
0 Replies
6. Solaris
Hi everyone,
I wonder if I can canvas any opinions or thoughts (good or bad) on SAN attaching a SUN V880/490 to an EMC Clarion SAN?
At the moment the 880 is using 12 internal FC-AL disks as a db server and seems to be doing a pretty good job. It is not I/O, CPU or Memory constrained and the... (2 Replies)
Discussion started by: si_linux
2 Replies
7. AIX
I've a problem with an IBM StorageWorks - Seagate SSA drive, model ST373453LC (IBM P/N 24P3733, Type S53D073, 72,8 GB 15K - USCSI 4 - 320 SSA). I bought this disk used but working; it came from an unknown IBM SSA storage array. I've removed the SCA - SSA adapter (IBM 18P3051 - 001 - R0) and i tried... (0 Replies)
Discussion started by: Linolinux
0 Replies
8. AIX
I am in the process of updating ssa adapters, drives and enclosures and wanted to know if there are any caveats that anyone would like to share. The documentation is not very clear on the ordering of the updates.
Any tips would be appreciated. (1 Reply)
Discussion started by: chosie
1 Replies
9. AIX
Helo:
We updated form AIX 4.3.3 to AIX 5.1-7 and after this we spent more than double time in read from external disks. Aparently the ssa cards microcode is at last level and all the ptf and apars are instaled.
Out backups expent more than double time, but curiously in read only, if we write in... (0 Replies)
Discussion started by: Javier Gutierre
0 Replies
10. AIX
Hi
Can I add disks on the fly to extend the capacity of an existing RAID 5 volume?
It's created on a 4P Advanced SSA Raid Adapter.
I need to extend a volume group, so I figured it would be easiest to extend the "physical disk" which is a RAID5 volume.
Thanks. (1 Reply)
Discussion started by: osee
1 Replies
numa_scheduling_groups(4) Kernel Interfaces Manual numa_scheduling_groups(4)
NAME
numa_scheduling_groups - Compaq Tru64 UNIX NUMA Scheduling Groups description (libnuma library)
DESCRIPTION
Normally, the kernel scheduler attempts to distribute the workload evenly over the entire machine. When the system resources are evenly
utilized, the machine is considered to be balanced. When balancing the workload, the scheduler operates in a context-free manner; that is,
processes may be distributed to various CPUs, or other resources, without regard to their function or relationship to one another. In cer-
tain cases, a user may wish to bundle a group of processes together so that they have equal access to the same system resources. For
instance, cooperating processes that share the same physical memory may perform better if all of these processes execute on CPUs that are
local to that memory.
NUMA Scheduling Groups (NSG) cause the scheduler load-balancing system to treat all members of an NSG as a unit. If one process belonging
to an NSG moves from one Resource Affinity Domain (RAD) to another, all other members of the NSG have to move with it.
NSGs and their members have the following characteristics: The resource domain of the first process joining an NSG provides the initial
resource domain location for that NSG, called the NSG home RAD. All other processes joining the NSG (through the nsg_attach_pid() func-
tion) will be migrated to the NSG home RAD. If the joining process is not allowed to migrate, the nsg_attach_pid() function will fail. To
support load balancing, an NSG is allowed to migrate to any RAD on the system if none of its members is bound to a specific resource (such
as another RAD, CPU, and so on). An NSG member is allowed to attach to or bind to a resource only if no other members are bound to differ-
ent resources. The entire NSG will migrate to the RAD containing the resource at the time it was successfully bound. If one NSG member is
bound to a resource, all other members of that NSG are also bound to the RAD containing that resource, because the NSG and, therefore its
members, is no longer allowed to migrate.
SEE ALSO
Commands: runon(1)
Functions: bind_to_cpu(3), nsg_attach_pid(3), nsg_detach_pid(3), nsg_destroy(3), nsg_get(3), nsg_get_pids(3), nsg_init(3), nsg_set(3),
numa_intro(3), rad_attach_pid(3), rad_bind_pid(3), rad_detach_pid(3)
numa_scheduling_groups(4)