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Sep
29
answered How to allow SSH logins even when filesystem forced check fails
Sep
29
comment Putting Oracle redo logs on DRAM SSD for a heavy write database?
Most likely the speed-up you experienced was not caused by enabling direct I/O, but by enabling asynchronous I/O. In Oracle, setall means direct+async.
Sep
29
comment Oracle 10g on RHEL - All memory gets eaten up nightly at 20.15
Related serverfault.com/questions/85470/…
Sep
9
comment What is the strategy for detecting time drift in a linux based data centre?
ntpq to check the status
Aug
29
comment How Fibre Channel Frames are populated and traverse a Fabric?
No broadcast. Node sends a query frame to the address 0xFFFFFC. Each switch usually listens on this addres, so the first switch which receives such frame responds. The response is a list of: P_ID, WWNN, and WWPN. Also, there is another optional mechanism called RSCN, where the switch itself sends a frame to the node after any new WWN appears on the list.
Aug
24
comment How Fibre Channel Frames are populated and traverse a Fabric?
Both were put to production use in previous millennium.
Aug
23
comment How Fibre Channel Frames are populated and traverse a Fabric?
Agree with IPv4 remark. But 127 endpoints in FC? No. You are talking about outdated fabric-less mode called a "private loop". In traditional fabric, 2^24 minus a small reserved pool.
Aug
23
comment How Fibre Channel Frames are populated and traverse a Fabric?
Yes, NodeA queries switch and then it keeps locally the current P_ID of the NodeB. It is possible to see own P_ID, but it depends on OS used. Point-to-point without a switch doesn't need PLOGI/FLOGI/WWNN/WWPN/P_ID: everything we see on the wire is adressed to us, everything we send is addressed to NodeB, we can't be mistaken, so we don't need any adressing.
Aug
22
comment How Fibre Channel Frames are populated and traverse a Fabric?
"FC itself has no concept of routing or switching"... Well, actually, if you compare either FC routing or switching to the IP world, then it becomes clear that FC has a really clean and consistent approach, and IP stack is an over-complicated and largely antiquated mess.
Aug
22
revised How Fibre Channel Frames are populated and traverse a Fabric?
added 346 characters in body
Aug
22
revised How Fibre Channel Frames are populated and traverse a Fabric?
added 346 characters in body
Aug
22
answered How Fibre Channel Frames are populated and traverse a Fabric?
Aug
15
comment How do I speed up “ls -l” on a network file system (NFS)?
ls only reads the directory, with -l it has to read the directory plus all 30000 inodes (because ownership and permission bits are stored there, not in the directory).
Aug
13
answered Unalterable folder or path to keep a mount point on Linux
Aug
10
revised VMware ESXI 5, adding a new physical SSD and use in Host Cache Configuration
one more related question
Aug
10
revised VMware ESXI 5, adding a new physical SSD and use in Host Cache Configuration
added 214 characters in body
Aug
10
comment VMware ESXI 5, adding a new physical SSD and use in Host Cache Configuration
Not necessarily, I've updated the answer.
Aug
10
answered VMware ESXI 5, adding a new physical SSD and use in Host Cache Configuration
Aug
8
revised Symantec Netbackup : Oracle restore fails “exited with status 13: file read failed”
grammar/style fixes
Aug
6
revised Muliplte logical drives on a single EVA
edited tags