From: "Paul Hampton"
Date: Wed, 6 Dec 2000 09:51:18 -0600 (CST)
From: Michael
Hi all
I'm running SuSe 6.4 on two web servers which are about to be load balanced. I wondered if anyone knew of a tool that would detect any file changes in my htdocs directory on one server, then replicate the changes on the other server. The current machines use Windows NT and Site Server for this process, but is there anything similar on Linux?
Thanks Paul
-- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
From: Jesse Marlin
I use wget for small jobs. For actual ftp mirroring I ue another tool that comes w/ Linux but I'm not sure of the name. fmirror or something like that.
wget does support mirroring. I am not sure how it compares to fmirror though. It is a full-featured tool that has a lot of options. Though I can't seem to find the option for supplying the proxy server.
*^*^*^* Have the courage to take your own thoughts seriously, for they will shape you. -- Albert Einstein
On Wed, 6 Dec 2000, Paul Hampton wrote:
Hi all
I'm running SuSe 6.4 on two web servers which are about to be load balanced. I wondered if anyone knew of a tool that would detect any file changes in my htdocs directory on one server, then replicate the changes on the other server. The current machines use Windows NT and Site Server for this process, but is there anything similar on Linux?
Thanks Paul
-- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
-- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
Message-ID: <3A2E6335.73024B9E@hursley.ibm.com>
Date: Wed, 06 Dec 2000 16:03:01 +0000
From: Derek Fountain
I'm running SuSe 6.4 on two web servers which are about to be load balanced. I wondered if anyone knew of a tool that would detect any file changes in my htdocs directory on one server, then replicate the changes on the other server. The current machines use Windows NT and Site Server for this process, but is there anything similar on Linux?
Do you actually need the mirroring for redundancy? If not you could just export the files from the original machine using NFS and have both machines use the same files. If there's enough RAM in the second server the OS will cache most of the data anyway and internal NFS network traffic will be minimal.
From: "Paul Hampton"
I wondered if anyone knew of a tool that would detect any file changes in my htdocs directory on one server, then replicate the changes on the other server. The current machines use Windows NT and Site Server for this process, but is there anything similar on Linux?
Do you actually need the mirroring for redundancy? If not you could just export the files from the original machine using NFS and have both machines use the same files. If there's enough RAM in the second server the OS will cache most of the data anyway and internal NFS network traffic will be minimal. -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
From: Bernd Felsche
From: fountai@hursley.ibm.com [mailto:fountai@hursley.ibm.com]
I'm running SuSe 6.4 on two web servers which are about to be load balanced. I wondered if anyone knew of a tool that would detect any file changes in my htdocs directory on one server, then replicate the changes on the other server. The current machines use Windows NT and Site Server for this process, but is there anything similar on Linux?
Do you actually need the mirroring for redundancy? If not you could just export the files from the original machine using NFS and have both machines use the same files. If there's enough RAM in the second server the OS will cache most of the data anyway and internal NFS network traffic will be minimal.
Unfortunately yes I need redundancy, I was hoping there was some kind of daemon available that monitored changes in a directory and then scp them automatically to the other servers. I want to avoid using cron as I really need actual realtime copying here...
Look at rsync. It can synchronise hosts quite nicely, even over low bandwidth connections including ssh-encrypted ones. I've found an rsync "server" running on a non-privileged port with its own security domain to be sufficient for mirroring components of hosts. I guess One could set up tripwire to work with rsync to get the changes out ASAP. But it's not "real time" because you see the changes on the "master" before all the redundants have those changes by using some sort of two-phase-commit. If you don't need that level of sophisitication, then rsync should do OK. -- /"\ Bernd Felsche - Innovative Reckoning, Perth, Western Australia \ / ASCII ribbon campaign | I'm a .signature virus! | X against HTML mail | Copy me into your ~/.signature| / \ and postings | to help me spread! |
Date: Thu, 7 Dec 2000 12:40:21 +0100 (CET)
From: Lenz Grimmer
I'm running SuSe 6.4 on two web servers which are about to be load balanced. I wondered if anyone knew of a tool that would detect any file changes in my htdocs directory on one server, then replicate the changes on the other server. The current machines use Windows NT and Site Server for this process, but is there anything similar on Linux?
rsync has been mentioned before, even though this is a clumsy solution. Have a look at DRB, this should be exactly, what you are looking for: http://www.complang.tuwien.ac.at/reisner/drbd/ "Drbd is a block device which is designed to build high availability clusters. This is done by mirroring a whole block device via (a dedicated) network. You could see it as a network raid 1" A great resource for question about High Availibility (HA) is Alan Robertson's Linux-HA page: http://linux-ha.org/ BTW: Alan is a member of the SuSE Labs, working on HA stuff like heartbeat and SGI's FailSafe. LenZ -- ------------------------------------------------------------------ Lenz Grimmer SuSE GmbH mailto:grimmer@suse.de Schanzaeckerstr. 10 http://www.suse.de/~grimmer/ 90443 Nuernberg, Germany Truncated: What happened to the peanut at the zoo
participants (6)
-
bernie＠innovative.iinet.net.au -
fountai＠hursley.ibm.com -
grimmer＠suse.de -
jlm＠compgen.com -
mogmios＠mlug.missouri.edu -
paul.hampton＠surfeu.com