Re: how to design mysql clusters with 30,000 clients?
Ideas? Noone mentioned it before, but if you may choose different database, ie postreSQL than there is a debian packaged program called dbbalancer (at least in woody). But as the authors states it works for now only with postgres. http://dbbalancer.sourceforge.net JA -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
messenger server or chat server
dear all, Anyone have a free messenger server or chat server and running under debian. I was try kit server but allways be error when installation on cryto. anyone have tips or trick for installation kit server or any messenger or chat server ? Thx 4 all akoe veronica -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: messenger server or chat server
dear all, Anyone have a free messenger server or chat server and running under debian. I was try kit server but allways be error when installation on cryto. anyone have tips or trick for installation kit server or any messenger or chat server ? www.jabber.org is a great one Thx 4 all akoe veronica -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] With kind regards, Wim Fournier -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to design mysql clusters with 30,000 clients?
On Wednesday 22 May 2002 18:44, Dave Watkins wrote: At 16:02 22/05/2002 +0800, Patrick Hsieh wrote: Hello list, I am expecting to have 30,000 http clients visting my website at the same time. To meet the HA requirement, we use dual firewall, dual Layer-4 switch and multiple web servers in the backend. My problem is, if we use the user-tracking system with apache, php and mysql, it will surely brings a huge amount of database traffic. How can I balance mysql load among multiple mysql server yet assure the data consistency among them? My idea is: I suggest that you do use clustering. However, you are better off running the Database in a fail over manner as opposed to load balancing multiple db machines. However, a bit of load balancing can be achieved if all reads are done from replicated machines and all writes are done to the master. Just as the manual suggests. For the rest of it (not including the firewalls and switch) you could use a product like TurboCluster 6. It will load balance and monitor the health of every machine in the cluster, including it's software, and in the event a node goes down, the action taken can be customized. The machine that manages the cluster can also run with a backup of it's own that in the event of failure would take over witout admin intervention. It can also track returning users and route them to a server they previously visited. You can understand why this is good. It doesn't care about what OS is running on any of the machines in the backend and the load balancing can even run Weighted round robin if you using a heterogenous topography. When designing our setup, I pushed hard to make sure that we used the same hardware and configuration in each machine as much as was possilbe. That certainly eases tuning issues. Anyway, I would check this out. The price is 2k$ for a ten node cluster and two traffic mangers. Nothing else is going to even close. Later on, TRC -- ___ Download the free Opera browser at http://www.opera.com/ Powered by Outblaze -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
cyrus imap cyradm authintication
Howdy, I just installed cyrus-imap with cyrus-admin on woody. I anm having a problem running the cyradm tool. When I do it asks for authentication, and every one I try (root or cyrus) gives an authentication failed error. So I can't add any mailboxes (or anything else with cyrus). It looks like the fix for cyrus 1.6 would be to run the saslpasswd command, but it seems that debian is running 1.5. How do I fix this in 1.5? thanks for the info, bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: cyrus imap cyradm authintication
Have you set the line admins: in /etc/imapd.conf ? On Fri, 24 May 2002, Bernie Berg wrote: Howdy, I just installed cyrus-imap with cyrus-admin on woody. I anm having a problem running the cyradm tool. When I do it asks for authentication, and every one I try (root or cyrus) gives an authentication failed error. So I can't add any mailboxes (or anything else with cyrus). It looks like the fix for cyrus 1.6 would be to run the saslpasswd command, but it seems that debian is running 1.5. How do I fix this in 1.5? thanks for the info, bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] -- __o _ \_ (_)/(_) Saludos de Julián EA4ACL -.- Foro Wireless Madrid http://opennetworks.rg3.net -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
RE: cyrus imap cyradm authintication
yeah, I just put root in there. I also tried adding cyrus. Didn't seem to help. [sorry, I ment to send the first reply to the list] -Original Message- From: Julián Muñoz [mailto:[EMAIL PROTECTED]] Sent: Friday, May 24, 2002 10:34 AM To: Bernie Berg Cc: [EMAIL PROTECTED] Subject: Re: cyrus imap cyradm authintication Have you set the line admins: in /etc/imapd.conf ? On Fri, 24 May 2002, Bernie Berg wrote: Howdy, I just installed cyrus-imap with cyrus-admin on woody. I anm having a problem running the cyradm tool. When I do it asks for authentication, and every one I try (root or cyrus) gives an authentication failed error. So I can't add any mailboxes (or anything else with cyrus). It looks like the fix for cyrus 1.6 would be to run the saslpasswd command, but it seems that debian is running 1.5. How do I fix this in 1.5? thanks for the info, bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] -- __o _ \_ (_)/(_) Saludos de Julián EA4ACL -.- Foro Wireless Madrid http://opennetworks.rg3.net -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to design mysql clusters with 30,000 clients?
I don't know if anyone else who followed-up on this thread has ever implemented a high traffic web site of this calibre, but the original poster is really just trying to band-aid a poor session management mechanism into working for traffic levels it wasn't really intended for. While he may still need a large amount of DB muscle for other things, using PHP/MySQL sessions for a site that really expects to have 30,000 different HTTP clients at peak instants is not very bright. We have cookies for this. Server-side sessions are a great fallback for paranoid end-users who disable cookies in their browser, but it is my understanding that PHP relies on a cookie-based session ID anyway? I tried to follow up with the original poster directly but I can't deliver mail to his MX for some reason. *shrug* Look into signed cookies for authen/authz/session, using a shared secret known by all your web servers. This is not a new concept, nor a difficult one. It can even be implemented using PHP, though a C apache module is smarter. -- Jeff S Wheeler [EMAIL PROTECTED] Software DevelopmentFive Elements, Inc http://www.five-elements.com/~jsw/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to design mysql clusters with 30,000 clients?
On Fri, May 24, 2002 at 01:42:12PM -0400, Jeff S Wheeler wrote: While he may still need a large amount of DB muscle for other things, using PHP/MySQL sessions for a site that really expects to have 30,000 different HTTP clients at peak instants is not very bright. We have cookies for this. Server-side sessions are a great fallback for paranoid end-users who disable cookies in their browser, but it is my understanding that PHP relies on a cookie-based session ID anyway? What's not very bright is rather using MySQL in a somewhat audacious configuration, for which support is quite recent (and thus, probably not bugfree). In a high load / high availability environnement. An Oracle would probably be better here. At least, it has proven replication mechanisms. Cookie based *whatever* is generally not a good idea. PHP sessions can be handled using cookies or URL signatures. And BTW, they do not necessarily require database backend. They can be handled on the filesystem, though I'm not sure whether it works well in a shared NFS environnement. Note: I never implemented something like this. These are juste ideas. -- Nicolas Bougues Axialys Interactive -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: rm: cannot unlink `sendmail': Operation not permitted
try chattr -i /usr/sbin
Even if sendmail is set -i, if the directory is immutable you will not
be able to rm it.
Pete
--
http://www.elbnet.com
ELB Internet Services, Inc.
Web Design, Computer Consulting, Internet Hosting
Jason Lim wrote:
Hi all,
This is happening on a Redhat 7.2 system, but i think it would apply
across all Linux distros.
[EMAIL PROTECTED] sbin]# pwd
/usr/sbin
[EMAIL PROTECTED] sbin]# chattr -iu sendmail
[EMAIL PROTECTED] sbin]# rm sendmail
rm: remove `sendmail'? y
rm: cannot unlink `sendmail': Operation not permitted
[EMAIL PROTECTED] sbin]# ls -al sendmail
-rwxr-xr-x 1 root root99161 May 1 01:21 sendmail
That is happening for all the files in that directory.
strace rm sendmail:
lstat64(sendmail, {st_mode=S_IFREG|0755, st_size=99161, ...}) = 0
access(sendmail, W_OK)= 0
unlink(sendmail) = -1 EPERM (Operation not
permitted)
Any ideas as to what may be happening?
Sincerely,
Jason
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SMail.info free email service
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Re: how to design mysql clusters with 30,000 clients?
Ideas? Noone mentioned it before, but if you may choose different database, ie postreSQL than there is a debian packaged program called dbbalancer (at least in woody). But as the authors states it works for now only with postgres. http://dbbalancer.sourceforge.net JA -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
messenger server or chat server
dear all, Anyone have a free messenger server or chat server and running under debian. I was try kit server but allways be error when installation on cryto. anyone have tips or trick for installation kit server or any messenger or chat server ? Thx 4 all akoe veronica -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: messenger server or chat server
dear all, Anyone have a free messenger server or chat server and running under debian. I was try kit server but allways be error when installation on cryto. anyone have tips or trick for installation kit server or any messenger or chat server ? www.jabber.org is a great one Thx 4 all akoe veronica -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] With kind regards, Wim Fournier -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to design mysql clusters with 30,000 clients?
On Wednesday 22 May 2002 18:44, Dave Watkins wrote: At 16:02 22/05/2002 +0800, Patrick Hsieh wrote: Hello list, I am expecting to have 30,000 http clients visting my website at the same time. To meet the HA requirement, we use dual firewall, dual Layer-4 switch and multiple web servers in the backend. My problem is, if we use the user-tracking system with apache, php and mysql, it will surely brings a huge amount of database traffic. How can I balance mysql load among multiple mysql server yet assure the data consistency among them? My idea is: I suggest that you do use clustering. However, you are better off running the Database in a fail over manner as opposed to load balancing multiple db machines. However, a bit of load balancing can be achieved if all reads are done from replicated machines and all writes are done to the master. Just as the manual suggests. For the rest of it (not including the firewalls and switch) you could use a product like TurboCluster 6. It will load balance and monitor the health of every machine in the cluster, including it's software, and in the event a node goes down, the action taken can be customized. The machine that manages the cluster can also run with a backup of it's own that in the event of failure would take over witout admin intervention. It can also track returning users and route them to a server they previously visited. You can understand why this is good. It doesn't care about what OS is running on any of the machines in the backend and the load balancing can even run Weighted round robin if you using a heterogenous topography. When designing our setup, I pushed hard to make sure that we used the same hardware and configuration in each machine as much as was possilbe. That certainly eases tuning issues. Anyway, I would check this out. The price is 2k$ for a ten node cluster and two traffic mangers. Nothing else is going to even close. Later on, TRC -- ___ Download the free Opera browser at http://www.opera.com/ Powered by Outblaze -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
cyrus imap cyradm authintication
Howdy, I just installed cyrus-imap with cyrus-admin on woody. I anm having a problem running the cyradm tool. When I do it asks for authentication, and every one I try (root or cyrus) gives an authentication failed error. So I can't add any mailboxes (or anything else with cyrus). It looks like the fix for cyrus 1.6 would be to run the saslpasswd command, but it seems that debian is running 1.5. How do I fix this in 1.5? thanks for the info, bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: cyrus imap cyradm authintication
Have you set the line admins: in /etc/imapd.conf ? On Fri, 24 May 2002, Bernie Berg wrote: Howdy, I just installed cyrus-imap with cyrus-admin on woody. I anm having a problem running the cyradm tool. When I do it asks for authentication, and every one I try (root or cyrus) gives an authentication failed error. So I can't add any mailboxes (or anything else with cyrus). It looks like the fix for cyrus 1.6 would be to run the saslpasswd command, but it seems that debian is running 1.5. How do I fix this in 1.5? thanks for the info, bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] -- __o _ \_ (_)/(_) Saludos de Julián EA4ACL -.- Foro Wireless Madrid http://opennetworks.rg3.net -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
RE: cyrus imap cyradm authintication
yeah, I just put root in there. I also tried adding cyrus. Didn't seem to help. [sorry, I ment to send the first reply to the list] -Original Message- From: Julián Muñoz [mailto:[EMAIL PROTECTED] Sent: Friday, May 24, 2002 10:34 AM To: Bernie Berg Cc: debian-isp@lists.debian.org Subject: Re: cyrus imap cyradm authintication Have you set the line admins: in /etc/imapd.conf ? On Fri, 24 May 2002, Bernie Berg wrote: Howdy, I just installed cyrus-imap with cyrus-admin on woody. I anm having a problem running the cyradm tool. When I do it asks for authentication, and every one I try (root or cyrus) gives an authentication failed error. So I can't add any mailboxes (or anything else with cyrus). It looks like the fix for cyrus 1.6 would be to run the saslpasswd command, but it seems that debian is running 1.5. How do I fix this in 1.5? thanks for the info, bernie -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] -- __o _ \_ (_)/(_) Saludos de Julián EA4ACL -.- Foro Wireless Madrid http://opennetworks.rg3.net -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to design mysql clusters with 30,000 clients?
I don't know if anyone else who followed-up on this thread has ever implemented a high traffic web site of this calibre, but the original poster is really just trying to band-aid a poor session management mechanism into working for traffic levels it wasn't really intended for. While he may still need a large amount of DB muscle for other things, using PHP/MySQL sessions for a site that really expects to have 30,000 different HTTP clients at peak instants is not very bright. We have cookies for this. Server-side sessions are a great fallback for paranoid end-users who disable cookies in their browser, but it is my understanding that PHP relies on a cookie-based session ID anyway? I tried to follow up with the original poster directly but I can't deliver mail to his MX for some reason. *shrug* Look into signed cookies for authen/authz/session, using a shared secret known by all your web servers. This is not a new concept, nor a difficult one. It can even be implemented using PHP, though a C apache module is smarter. -- Jeff S Wheeler [EMAIL PROTECTED] Software DevelopmentFive Elements, Inc http://www.five-elements.com/~jsw/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to design mysql clusters with 30,000 clients?
On Fri, May 24, 2002 at 01:42:12PM -0400, Jeff S Wheeler wrote: While he may still need a large amount of DB muscle for other things, using PHP/MySQL sessions for a site that really expects to have 30,000 different HTTP clients at peak instants is not very bright. We have cookies for this. Server-side sessions are a great fallback for paranoid end-users who disable cookies in their browser, but it is my understanding that PHP relies on a cookie-based session ID anyway? What's not very bright is rather using MySQL in a somewhat audacious configuration, for which support is quite recent (and thus, probably not bugfree). In a high load / high availability environnement. An Oracle would probably be better here. At least, it has proven replication mechanisms. Cookie based *whatever* is generally not a good idea. PHP sessions can be handled using cookies or URL signatures. And BTW, they do not necessarily require database backend. They can be handled on the filesystem, though I'm not sure whether it works well in a shared NFS environnement. Note: I never implemented something like this. These are juste ideas. -- Nicolas Bougues Axialys Interactive -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
