similar to: Virtualization as cheap redundancy option?

I've been reading that it's possible to set up a system with multiple NIC to provide redundant internet connectivity such that it will switch to a secondary connection if the primary ISP fails. Is it possible in a similar way to setup redundant LAN routing? I read that it is possible to aggregate/bond multiple NIC to stackable switches that support link aggregation and redundancy. But if

Hello, My host just had a faulty power supply and therefore, my Asterisk server was down for 7 hours. It was a Sunday so no one was making calls, however if it happened during the week, I'd have problems. I was trying to find a whitepaper or advice on how to set up two Asterisk servers to provide some redundancy. I've been googling "asterisk redundancy" but all I've found

I've got a CentOS 5 server that I want to migrate over into a virtualized instance. The problem is I need to minimize downtime so was trying to figure out a way to "live" clone the original. Initially, I thought I could do this via exporting an iSCSI target from the virtual host, create a MD raid 1 array on the C5 server, wait for it to sync, then shutdown the physical server and

Hi List, Being very new to Xen I have a few generic questions for the list, I hope to grab some useful advice and pointers to documentation. I am evaluating Xen to consolidate a few existing servers into one appliance (mainly in order to reduce power consumption, heat, and hardware failure risks). I plan to have a SER router, an Asterisk LCR router, a voicemail server, a calling card server

Looking to cluster an FTP server. Right now we do a mix of stuff where we use a few separate servers linked through various hacks, that utilizes VSFTPd heavily for hundreds of television station news websites, where, of course, the current weather maps get uploaded from everywhere, all day, from NOAA and the like. I'd like to move from the current setup to something that's more HA

If I''m gonna use OpenSolaris, I will have to buy new hardware, which I can''t really defend at the moment. But I may be able to defend it in the near future if using redundancy on ZDF uses less disk space as simply getting extra drives and do identical copies, with periodic CRC checks of the source material to check the health. Or will I use as much drive space with redundancy?

I'm trying to justify a GlusterFS storage system for my technology development group and I want to get some clarification on something that I can't seem to figure out architecture wise... My storage system will be rather large. Significant fraction of a petabyte and will require scaling in size for at least one decade. from what I understand GlusterFS achieves redundancy through

I've been leaning towards actually deploying gluster in one of my projects for a while and finally a probable candidate project came up. However, researching into the specific use case, it seems that gluster isn't really suitable for load profiles that deal with lots of concurrent small files. e.g. http://www.techforce.com.br/news/linux_blog/glusterfs_tuning_small_files

Hi, I use dovecot for a long time now, but only as a single isolated server each time. I joined a company a few years back. We had trouble with compagnies hosting our mail, supposedly full redundant and so on. The company is small, but we have many dealers around the world, and it's growing. Mail became the fist choice for clients to contact the dealers. No mail, and we loose sales. For

I''ve currently got a Xen 2 system running on a CL10000 VIA system. I''d like to upgrade to Xen 3 and make use of the hardware virtualization support in Xen (sometimes). My requirements then: 1) Cheap CPU. AMD or Intel. Must have Xen3 hardware VM support. Any speed. 2) Lower power consumption from the CPU 3) Cheap mobo to support the chip. 4) Decent raid-1 SATA support on the

Which of these would be the recommended virtualization platform for mainly CentOS guest on CentOS host for running a virtualized mail server? From what I've read, objectively it seems that VMWare's still the way to go although I would had like to go with Xen or KVM just as a matter of subjective preference. VMWare's offering seems to have the best support and tools, plus likely the

Hi! Seeking pardon from the experts, but I have a basic usage question that I could not find a straightforward answer to. I have a two node cluster, with two bricks replicated, one on each node. Lets say one of the node dies and is unreachable. I want to be able to spin a new node and replace the dead node's brick to a location on the new node. The command 'gluster volume

I want to build 2 servers (both running samba) to provide file storage to 2 offices (approx 100 miles apart, linked via DSL) but all data writen to 1 server must also be saved to the other server. Both servers would also allow users to access the data via a VPN thus allowing 1 office with a failed server to access the other server via the vpn and still see the data from both offices. I currently

I was having problems with the same server locking up to the point I can't even get in via SSH. I've already used HTB/TC to reserve bandwidth for my SSH port but the problem now isn't an attack on the bandwidth. So I'm trying to figure out if there's a way to ensure that SSH is given cpu and i/o priority. However, so far reading seems to imply that it's probably not going

I've got a custom VMWare image that I need to find a host for. Anyone know of a good ISP that offers VMWare hosting packages?

Just so I am clear the upgrade process will be as follows: upgrade all clients to 4.0 rolling upgrade all servers to 4.0 (with GD1) kill all GD1 daemons on all servers and run upgrade script (new clients unable to connect at this point) start GD2 ( necessary or does the upgrade script do this?) I assume that once the cluster had been migrated to GD2 the glusterd startup script will be smart

Hi! I''ve been using parallels, vmware player, or virtual pc (did not try xen yet) for development, testing and experimenting with new platforms (and I must say I love them - copy paste a few files, and I have a clean deployment box etc) Since the RailsConf and various talks I''ve seen (like Jason Hoffmann''s http://svn.joyent.com/public/JasonHoffman-EuroRailsConf.pdf ,

On 06/17/2015 09:54 AM, Alessandro Baggi wrote: > Also ESX(i) is not CentOS related but is included in this post. > And what about oVirt? MMmmm, I really thought ESX was in some way a RHEL derivative but when reading http://www.v-front.de/2013/08/a-myth-busted-and-faq-esxi-is-not-based.html it is clearly not... Anyway, I learnt a new thing today ;-) oVirt, in my opinion, is a bit

Is it possible or will there be any problems with using mdraid on top of mdraid? specifically say mdraid 1/5 on top of mdraid multipath. e.g. 4 storage machines exporting iSCSI targets via two different physical network switches then use multipath to create md block devices then use mdraid on these md block devices The purpose being the storage array surviving a physical network switch

Hello everyone, I''ve got a Rails app that''s going to replace an in-house application, where the customers are used to having to deal with maintaining their own servers and data. As these are non-IT customers, maintaining servers and data is a long way from their core business and thus quite costly for them. I''m hoping to slice their costs by removing the requirement