Redhat 7 wwn


redhat 7 wwn

Red Hat Enterprise Linux 4, 5, 6, 7 . How can I find the WWN (World Wide Name) of my QLogic card in Red Hat
Enterprise Linux.

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Advanced Zoning (default zoning, port/WWN zoning, broadcast zoning). *SUSE Linux Enterprise Server. Red Hat Enterprise Linux. DPI Universal 7 C13 PDU (with 2. Lenovo B6505 and B6510 FC SAN Switches > Lenovo.

My trip running for VCDX has spanned over three years. During my VCDX Trip I have changed companies once, Changed position 3 times, changed countries three times, & even change continent from Middle East(Asia) to Canada(North America). After that I have upgraded my design to vSphere 4 & passed VCP4 & VCAP-DCD and was looking for the opportunity to defend when the defense come close by & here its right in my town in Toronto two weeks back. If things go all around again, I would still for sure run for it. I have completed the per-requisites for VCDX3 before the last VCDX3 defense, but I could not defend as it was held in the US and I failed to obtain the Visa on time back then. It was a hell of a trip with all these busy moves, but it was well worth it. Today in the morning when I opened my e-mail, I could not believe my eyes when I got the congratulation letter for being VCDX#89 after defending two weeks back in Toronto.

Cisco C880 M4 Server with SAP HANA Tailored Datacenter ...

Posted by mikent on February 7, 2012. To Find all HBA insterface on your system: lspci -nn | grep -i hba. How to find WWPN of HBA on RedHat 6.

I was actually surprised to see how large of a package I got knowing that I did not order anything that big lately. Below is a picture of the box before even picking it up. To be more accurate VCDXSanta has left my VCDX gift box at FedEX office and requested me to pick it up. When I went to the VCDX office I had no clue what the package I got and they refused to share any information about it with me on the phone. As soon I read the address on the package I was able to tell its my VCDX goodies & swapped my phone and took a picture of the package at the FedEX office which got them to give me a weird look as I had no clue what package I am expecting when I arrived there and now shooting a photo of the package. While VCDXSanta has missed Christmas day this time, he still delivered my VCDX gift box today.

Example
C:Windowssystem32>powermt display dev=all
Pseudo name=harddisk1
VPLEX ID=FNM00123123123
Logical device ID=60001110000000111111F69795C23D18
state=alive; policy=ADaptive; queued-IOs=0
==============================================================================
————— Host —————   – Stor – — I/O Path —   — Stats —
### HW Path               I/O Paths   Interf. Mode     State   Q-IOs Errors
==============================================================================
5 port5path0tgt3lun0 c5t3d0     06       active   alive     0     0
5 port5path0tgt2lun0 c5t2d0     04       active   alive     0     0
5 port5path0tgt1lun0 c5t1d0     00       active   alive     0     0
5 port5path0tgt0lun0 c5t0d0     02       active   alive     0     0
3 port3path0tgt3lun0 c3t3d0     01       active   alive     0     0
3 port3path0tgt2lun0 c3t2d0     03       active   alive     0     0
3 port3path0tgt1lun0 c3t1d0     05      active   alive     0     0
3 port3path0tgt0lun0 c3t0d0     07       active   alive     0     0.

redhat 7 wwn

Previous message: Redhat 7. It does run, I ran into 2 dependency issues, one was IPtables, I removed it, we aren’t using it. 3 kernel updates on 7.

Multipath configuration is done exclusively via /etc/multipath. Next paragraphs assume that you know a little bit the multipath configuration file structure. For a comprehensive review of this configuration file please see http://sources.

The example belows shows the WWN number of the qlogic 2300 adapter on RedHat 3. Awk Introduction – 7 Awk Print Examples · Advanced Sed . Question: How do I lookup the wwn address of my HBA card installed on.

The Lenovo B6505 and B6510 FC SAN Switches provide exceptional price/performance value by delivering market-leading 16 Gb Gen 5 Fibre Channel technology and combining flexibility, simplicity, and enterprise-class functionality that supports highly virtualized environments to meet the demands of hyper-scale, private cloud storage.

Getting the LUN WWID on RHEL is critical when dealing with multiple different Storage systems. You can use the scsi_id command to find a WWID scsi_id -g -u.

redhat 7 wwn


5 responses on “Redhat 7 wwn

  1. By continuing browsing, you accept the terms of our Privacy Policy. Com uses own and third party cookies to enhance your experience when visiting our website and to serve you with information that might be of your interest. You can change the settings in your browser.

  2. , it does not exist), we jump to the error handler and quit. If we fail to open the input file (e. We pop argv[1] to ECX. Otherwise, we continue the program as before: Reading from stdin , writing to stdout. This register is particularly suited for pointers, as we can handle NULL pointers with jecxz. If argv[1] is not NULL, we try to open the file named in the first argument.

  3. Nio to provide full support for nonblocking I/O (and some other goodies). Try it out and give Sun feedback. “Re: fix for hybrid server problems” by Vivek Sadananda Pai ([email protected] Medusa – a server-writing toolkit in Python that tries to deliver very high performance. The clone() function in Linux (and its friends in other operating systems) lets you create a thread that has its own current working directory, for instance, which can be very helpful when implementing an ftp server. A zero-copy implementation of sendfile() is on its way for the 2. IBM has an excellent paper titled Java server benchmarks [Baylor et al, 2000]. With this feature, zero-copy is automatically enabled, if data more than 4096 bytes are specified as data to be sent. This technique should be easily applicable to servers written with select, poll, or any system call that returns a count of readiness events per call (e. 205 2003/11/03 06:55:26 dank Link to Vivek Pei’s new Flash paper, mention great specweb99 score Copyright 1999-2014 Dan Kegel
    [email protected] Edu) on new-httpd, May 9th, states: “I’ve compared the raw performance of a select-based server with a multiple-process server on both FreeBSD and Solaris/x86. Interfacing Java to the Virtual Interface Architecture, by C-C. I suspect that this will be most useful when sending to a socket in blocking mode; it’d be a bit of a pain to use with a nonblocking socket. Solaris 8 (as of the July 2001 update) has a new system call ‘sendfilev’. Behave sensibly on overload. ) Jef Poskanzer has published benchmarks comparing many web servers. ] Describes a version of thttpd modified to support /dev/poll. Chuck Lever keeps reminding us about Banga and Druschel’s paper on web server benchmarking. Rumored to be even faster than khttpd. 6 release by specifying “SOSEND_LOAN” kernel option. Not all threads are created equal. Rik van Riel’s Linux Performance Tuning site Translations Belorussian translation provided by Patric Conrad at Ucallweconn Changelog 2011/07/21 Added nginx. Peter Ladkin’s Web Server Performance page. On microbenchmarks, there’s only a marginal difference in performance stemming from the software architecture. ) Adrian Chadd says “I’m doing a lot of work to make squid actually LIKE a kqueue IO system”; it’s an official Squid subproject; see http://squid. It can be used equally well in servers using threads or servers using nonblocking I/O. Tomcat on 1 to 12 processors Prof. Other interesting links Jeff Darcy’s notes on high-performance server design Ericsson’s ARIES project — benchmark results for Apache 1 vs. Examples Nginx is a web server that uses whatever high-efficiency network event mechanism is available on the target OS. While multiple-process servers can do it at a higher cost, it’s harder to get the same benefits on real workloads (vs microbenchmarks). The big performance win for select-based servers stems from doing application-level caching. 4 introduced the package java. 208 2006/07/13 14:50:29 dank Link to Polyakov’s patches Revision 1. See the original announcement by Fabio Riccardi. This option is now default on NetBSD-current (you can disable this feature by specifying “SOSEND_NO_LOAN” in the kernel option on NetBSD_current). See their benchmark page. See also Mike Jagdis’ work on improving select() and poll(); here’s Mike’s post about it. In March 1999, Microsoft sponsored a benchmark comparing NT to Linux at serving large numbers of http and smb clients, in which they failed to see good results from Linux. I also have a few old notes about comparing thttpd to Apache that may be of interest to beginners. Java issues Up through JDK 1. Some programs can benefit from using non-Posix threads. See also my article on Mindcraft’s April 1999 Benchmarks for more info. JSR-51 was the Sun project that came up with the java. Before NIO, there were several proposals for improving Java’s networking APIs: Matt Welsh’s Jaguar system proposes preserialized objects, new Java bytecodes, and memory management changes to allow the use of asynchronous I/O with Java. This lets the OS do it as efficiently as possible. Matt Welsh participated (who says Sun doesn’t listen. His class library is called java-nbio; it’s part of the Sandstorm project. Library, updated Polyakov links Revision 1. See the release notes for some caveats. According to a note from Noriyuki Soda: Sending side zero-copy is supported since NetBSD-1. It’s worth a read. IO-Lite is a proposal for a set of I/O primitives that gets rid of the need for many copies. See also Volano’s detailed instructions for raising file, thread, and FD_SET limits in the 2. Html,v $ Revision 1. 210 2006/07/27 10:18:58 dank Listify polyakov links, add Drepper’s new proposal, note that FreeBSD 7 might move to 1:1 Revision 1. Quite the pretty performance graph. Measuring Server Performance Two tests in particular are simple, interesting, and hard: raw connections per second (how many 512 byte files per second can you serve. Too much thread-local memory is preallocated by some operating systems; if each thread gets 1MB, and total VM space is 2GB, that creates an upper limit of 2000 threads. It’s worth a read. They’re doing interesting work, including Niels Provos’ hinting poll patch, and some work on the thundering herd problem. ) total transfer rate on large files with many slow clients (how many 28. ) Ingo implemented a form of zero-copy TCP in the 2. It has good performance, but doesn’t scale with the number of CPU’s. Claims it’s faster than sendfile(). USENIX 2000, San Diego, California (June, 2000). This uses the 2. Unsetting the option flushes the buffer. Avoid small frames by using writev (or TCP_CORK)
    A new socket option under Linux, TCP_CORK, tells the kernel to avoid sending partial frames, which helps a bit e. Interesting thread-based servers Hoser FTPD. In May 2001, JDK 1. 21 or later, and includes the needed patches for earlier kernels. The sendfile() function in Linux and FreeBSD lets you tell the kernel to send part or all of a file. It would be interesting to port the Volano scalability benchmark to C, and see what the upper limit on number of threads is for the various operating systems. See their tuning guide. The other non-Java servers listed at http://www. 211 2006/07/27 10:28:58 dank Link to Cal Henderson’s book. Fhttpd boa Roxen Zeus, a commercial server that tries to be the absolute fastest. A copy of the man page is here. 1 should be ok. See Linux Weekly News, Kernel Traffic, the Linux-Kernel mailing list, and my Mindcraft Redux page. Edu) writes that rate-based clocking in TCP can improve HTTP response time over ‘slow’ connections by 80%. If you’ve got postscript, the paper is available at http://www. (This is apparently newer than Benno’s patch. This document steps you through a lot of stuff that would be hard to figure out yourself, but is somewhat dated. (He did like sendfile(), though. There may be other causes. Performance is compared with phhttpd. 0 in July 2000, and says he’ll make it available to userspace soon. Lever, “Scalable Network I/O in Linux,” May, 2000. 6 had, and the OS or http daemon has a hard limit on the number of connections open, you would expect exactly this behavior. Many systems use 16 bit variables to hold process or thread id’s. When there are lots of little write() calls you can’t bundle together for some reason. Notice how various servers have trouble above 128 connections, even on Solaris 2. See his post of 31 May 1999 for some notes. See LWN Jan 25 2001. Note: if the TCP stack has a bug that causes a short (200ms) delay at SYN or FIN time, as Linux 2. The Solaris 8 7/01 release notes also mention it. Interesting epoll-based servers ribs2 cmogstored – uses epoll/kqueue for most networking, threads for disk and accept4 Interesting kqueue()-based servers thttpd (as of version 2. Java: See Volano’s detailed benchmark info, plus their info on how to tune various systems to handle lots of threads. 212 2006/09/02 14:52:13 dank added asio Revision 1. Look at the performance comparison graph at the bottom of http://www. I’ll be presenting those measurements as part of a paper that’ll appear at the next Usenix conference. ” Uses the siginfo features of 2. Com benefitted noticeably from sendfile(). In 2000, Matt Welsh implemented nonblocking sockets for Java; his performance benchmarks show that they have advantages over blocking sockets in servers handling many (up to 10000) connections. Uses a single process. See Hoser FTPd for an example of the use of native threads rather than pthreads. ) Rumor has it, ftp. Html Sun’s Java Web Server (which has been reported to handle 500 simultaneous clients) Interesting in-kernel servers khttpd “TUX” (Threaded linUX webserver) by Ingo Molnar et al. See also Exploring The sendfile System Call by Jeff Tranter in Linux Gazette issue 91. The source is available under a community source (not open source) license. Thomas Ogrisegg’s zero-copy send patch for mmaped files under Linux 2. One developer using sendfile() with Freebsd reports that using POLLWRBAND instead of POLLOUT makes a big difference. 206 2003/11/03 07:44:34 dank link to userver Revision 1. 207 2003/11/03 08:09:39 dank Link to Linus’s message deprecating the idea of aio_open Revision 1. 3, Java’s standard networking libraries mostly offered the one-thread-per-client model. Html for his results. Any scheme that eliminates these copies to the bare physical minimum is called “zero-copy”. Can also use kqueue. There was a way to do nonblocking reads, but no way to do nonblocking writes. Caching your own data can sometimes be a win. Alan Cox noted that zero-copy is sometimes not worth the trouble back in 1999. Zach Brown’s phhttpd – “a quick web server that was written to showcase the sigio/siginfo event model. Com
    Last updated: 5 February 2014
    [Return to www. Interesting select()-based servers thttpd Very simple. Anyone who figures out why, let me know. Novell’s FastCache — claims 10000 hits per second. (In Linux, it’s poorly documented at the moment; use _syscall4 to call it. ) Interesting realtime signal-based servers Chromium’s X15. Von Eicken, proposes memory management changes to allow the use of asynchronous I/O with Java. They used a smoothed version of “number of clients with I/O ready” as a measure of overload. 4 kernel for TUX 1. But see followups to this message on linux-kernel for people’s misgivings about the speed of those memory management tricks. Userver – a small http server that can use select, poll, epoll, or sigio Interesting /dev/poll-based servers N. See LWN Jan 25 2001 for a summary of some very interesting discussions on linux-kernel about TCP_CORK and a possible alternative MSG_MORE. Drew Gallatin and Robert Picco have added some zero-copy features to FreeBSD; the idea seems to be that if you call write() or read() on a socket, the pointer is page-aligned, and the amount of data transferred is at least a page, *and* you don’t immediately reuse the buffer, memory management tricks will be used to avoid copies. HP’s java also includes a Thread Polling API. Consider this code highly experimental and yourself highly mental if you try and use it in a production environment. It’s getting popular; there are even two books about it. 4 kernel’s SIGIO feature together with sendfile() and TCP_CORK, and reportedly achieves higher speed than even TUX. Better to use writev(), though. 8k modem clients can simultaneously download from your server before performance goes to pot. Benchmarks showing performance with 10000 connections are available. [Provos, Lever, and Tweedie 2000] notes that dropping incoming connections when the server is overloaded improved the shape of the performance curve, and reduced the overall error rate. See also The Linux Scalability Project. Peter Eriksson’s phttpd and pftpd The Java-based servers listed at http://www. Edu/~vivek/flash99/” Other limits Old system libraries might use 16 bit variables to hold file handles, which causes trouble above 32767 handles. Other tips Zero-Copy
    Normally, data gets copied many times on its way from here to there. Andi Kleen is writing new man pages that cover this. Kernel Issues For Linux, it looks like kernel bottlenecks are being fixed constantly. 209 2006/07/13 15:07:03 dank link to Scale. The sendfile() system call can implement zero-copy networking. Html BetaFTPd Flash-Lite – web server using IO-Lite. See also Dean Gaudet’s essay on the subject of Java, network I/O, and threads, and the paper by Matt Welsh on events vs. Flash: An efficient and portable Web server — uses select(), mmap(), mincore() The Flash web server as of 2003 — uses select(), modified sendfile(), async open() xitami – uses select() to implement its own thread abstraction for portability to systems without threads.

  4. Here’s how to do it, using SSH and an iPad. Building the FreeBSD kernel is easy, once you understand the process involved.

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