Open Source Monitoring. Surveillance de sites, surveillance url. The Five Stages of Hosting (Pinboard Blog) The Five Stages of Hosting As a proud VPS survivor, I thought it might be fun to write up five common options for hosting a web business, ranked in decreasing order of 'cloudiness'.
People who aren't interested in this kind of minutia would be wise to pull the rip cord right here. 1. The Monastery You run your site on an 'application platform' like Heroku, Azure, or Google App Engine. Good: Skilled beardos toiling behind the scenes make sure everything Just Works. Bad: You have to design your app in a very specific way, and learn the holy texts by heart. 2. You lease a virtual server from a company like Linode, prgmr, Slicehost or Amazon.
Good: You are isolated from a lot of real responsibility. Bad: Sometimes you will REALLY notice the neighbors, and can't do anything about it. The larger tiers of virtual hosting are expensive compared to equivalent dedicated servers. 3. You lease a dedicated server from a company like Leaseweb or ServerBeach or a thousand others. 4. 5.
The State of Open-Source Monitoring. HAProxy - The Reliable, High Performance TCP/HTTP Load Balancer. How do I install Oracle Java JDK 7. How to build a 40TB file server. The one most valuable asset at Oyster.com is our photo collection.
Take away the intellectual property and what’s left is, essentially, markup (with a bit of backend to snazz it up.) So we need a solid backup solution for the original high-res photos. The old servers were about to run out of capacity and their slightly outdated specs did not make transferring huge datasets any easier or faster. Thinking a few months ahead, we were looking at a 40TB data set. In strict accordance with KISS methodology, we opted against LTO and S3, and decided to build a big BOX. Areca 1882ix-24 RAID Controller Coincidentally, a great new product was just about to hit the market, reinforcing our decision with its timely relevance — the dual-core Areca ARC-1882ix RAID Host Bus Adapter, which comes with an on-board DDR3 SDRAM socket with up to 4GB chip support. Internal mini-SAS connectors (SFF-8087) The housing assembly comes with six individual backplanes, each accommodating four SAS or SATA disks.
Why is RAID So Important for Databases? TimeMovedBackwards - Dovecot Wiki. Dovecot isn't very forgiving if your system's time moves backwards.
There are usually two possibilities why it's moving backwards: You're running ntpdate periodically. This isn't a good idea. You're using some kind of a virtual server and you haven't configured it right (or it's buggy). Moving time backwards might cause various problems (see below), so Dovecot versions older than v2.0 don't even try to handle the situation.
Time synchronization There are two choices for synchronizing your clock: Use ntpd. If all else fails, you can just go and remove the error checking code from src/lib/ioloop.c. In some systems ntpd/ntpdate is run at boot, but only after Dovecot has started. Bugs/Issues With Xen you should run ntpd only in dom0. What about Daylight Saving/Summer time?
Vérifier l'état du RAID. Vous avez un serveur dédié et vous souhaitez connaitre l'état de votre RAID. Raid Logiciel Si vous avez du raid logiciel sur votre serveur, vous pouivez connaitre l'etat de votre raid, afin de voir si vos disques sont bien fonctionnels. Pour ce faire, loggez vous en ssh, et tapez la commande cat /proc/mdstat Vous devriez voir ceci: Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] md1 : active raid1 sdb1[1] sda1[0] 48064 blocks [2/2] [UU] md2 : active raid1 sdb2[1] sda2[0] 9936128 blocks [2/2] [UU] md5 : active raid1 sdb5[1] sda5[0] 9767424 blocks [2/2] [UU] md6 : active raid1 sdb6[1] sda6[0] 136038272 blocks [2/2] [UU] unused devices: <none> Prenons la partition md6. Installer DomainKeys sur Postfix (Debian Etch, Amavisd-new...) -
Mise à jour le 12 mars 2008 : le même billet adapté pour DKIM est disponible : Installer la signature DKIM sur Postfix avec DKIMproxy.
Dans ma lutte incessante pour que mes messages n'aient pas comme destination finale les dossiers "courrier indésirable" des "grands" fournisseurs tels que Yahoo! , Hotmail/MSN, Gmail ect... Nagios Plugins. ParaVM or full-VM or Cloud ? Xen.