search for: matty91

This should make CentOS even better!: https://www.geekwire.com/2018/red-hat-snaps-coreos-250m-adding-big-piece-container-strategy/ - Ryan https://prefetch.net

George Wilson put together a list of ZFS enhancements and bug fixes that were integrated into Solaris 10 update 3, and I was curious if there was something similar for update 4? There have been a bunch of reliability and performance enhancements to the ZFS code over the past few months, and I am curious which ones were integrated into the latest Solaris 10 update (I can''t seem to find a

Howdy, I just finished reading through the Crossbow presentation: http://blogs.sun.com/sunay/resource/crossbow.pdf And have one question. If you create a virtual NIC with dladm: $ dladm create-vnic -d bge0 -m 0:1:2:3:4:5 -b 10000 1 Can you then add vnic1 directly to the zone? e.g.: zonecfg -z zone1 zonecfg:zone1> create zonecfg:zone1> set zonepath=/zones/zone1 zonecfg:zone1> add net

Howdy, I wrote a pair of scripts to measure file and NFSv3 operations, and thought I would share them with the folks on the list. You can view the script output by pointing your browser at the following URLs: Per Process NFSv3 Client statistics (inspired by fsstat/nfsstat): http://daemons.net/~matty/code/nfsclientstats.pl.txt Per Process File Operations (inspired by fsstat):

Howdy, I just got done reading the following article on using DTrace to debug C++ applications: http://developer.sun.com/solaris/articles/dtrace_cc.html And was curious if there is a way to use DTrace to grab the number of bytes free() returns to the application? The malloc(), free() and brk() manual pages don''t provide a whole lot of info on what happens when free() is called, and I

Howdy, Does anyone happen to know where I can locate the changes that were integrated into a specific RPM update? I checked the wiki, the rpm query output and bugs.centos.org, but wasn't able to locate a changelog for the latest kernel update. Thanks, - Ryan

We are running a process on a CentOS box, and periodically it dies. Does anyone happen to have any recommendations for a lightweight tool that can be used to monitor processes and restart them if they happen to fail? I looked at monit, but it appears to be a bit much for restarting a process. Thanks for any feedback, - Ryan

Howdy, I was playing around with the malloc/free D script provided by Philip Beevers: http://www.opensolaris.org/jive/thread.jspa?threadID=4224&tstart=15 And decided to change the free:entry probe from: pid24169::free:entry / sz[arg0] / { printf("Freeing %p (size %d)\n", arg0, sz[arg0]); sz[arg0] = 0; } to: pid24169::free:entry / ! sz[arg0] / { printf("[ *

Howdy, We are using ZFS on one of our Solaris 10 servers, and the box paniced this evening with the following stack trace: Nov 24 04:03:35 foo unix: [ID 100000 kern.notice] Nov 24 04:03:35 foo genunix: [ID 802836 kern.notice] fffffe80004a14d0 fffffffffb9b49f3 () Nov 24 04:03:35 foo genunix: [ID 655072 kern.notice] fffffe80004a1550 zfs:space_map_remove+239 () Nov 24 04:03:35 foo genunix: [ID

Howdy, I installed Nevada build 49 in a parallels VM on my intel mac mini, and when I run the following DTrace script: $ cat follow.d #pragma option D flowindent; pid$target:::entry, pid$target:::return {} $ cat format.cmds disk 0 exit $ dtrace -s follow.d -o follow.out -c "/usr/sbin/format -f format.cmds" dtrace: script ''follow.d'' matched 13641 probes The system

I think it depends on who you ask. Facebook and Netflix are using it extensively in production: https://www.linux.com/news/learn/intro-to-linux/how-facebook-uses-linux-and-btrfs-interview-chris-mason Though they have the in-house kernel engineering resources to troubleshoot problems. When I see quotes like this [1] on the product's WIKI: "The parity RAID code has multiple serious

Howdy, We are running zones on a number of Solaris 10 update 3 hosts, and we are bumping into an issue where the kernel doesn''t clean up connections after an application exits. When this issue occurs, the netstat utility doesn''t show anything listening on the port the application uses (8080 in the example below), but connections are still listed in the ESTABLISHED state: $

Howdy, I just installed the crossbow snapshot from opensolaris.org, and bumped into an issue when attempting to create a virtual nic: $ dladm create-vnic -i 192.168.1.101 -d ni0 2 dladm: VNIC creation failed: No such file or directory (unknown diagnostic) When I truss the process, it looks like it''s failing when attempting to open the vnic pseudo-device: 100878/1:

One of our Solaris 10 update 3 servers paniced today with the following error: Sep 18 00:34:53 m2000ef savecore: [ID 570001 auth.error] reboot after panic: assertion failed: ss != NULL, file: ../../common/fs/zfs/space_map.c, line: 125 The server saved a core file, and the resulting backtrace is listed below: $ mdb unix.0 vmcore.0 > $c vpanic() 0xfffffffffb9b49f3() space_map_remove+0x239()

Howdy, I am attempting to isolate the location of a memory leak in a 4GL program, and have hit a bit of a snag. When I LD_PRELOAD libumem and run the application server, "::findleaks -fdv" reports numerous leaks: CACHE LEAKED BUFCTL CALLER 0000000100b49068 15 0000000100ef2d50 fdcon+0x6c4 0000000100b50028 1 0000000100b72ac0 fdcon+0x6c4 0000000100b49068

Howdy, I am trying to migrate several scripts to use application defined types, and am running into a few issues. When I attempt to run a script with a application defined type, it looks like the DTrace preprocessor is getting angry with me: $ cat view.d #include "httpd.h" :::acceptconnection { this->addr = (conn_rec *)copyin(arg0,sizeof(conn_rec *)); } $ dtrace -C

Howdy, Is there a method to get the number of elements in an aggregation? Are the results stored in an aggregation guaranteed to be in any type of order? Thanks for any insight, - Ryan -- UNIX Administrator http://daemons.net/~matty