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7
votes
4answers
860 views

Can RHEL6 servers be “copied”?

My company needs to setup a development server and we already have 2 production RHEL 6 servers working under a L4 switch. One of the solutions to setup the dev server was to simple copy all files ...
7
votes
4answers
13k views

How to build a high availability Postfix system?

I'm needing to set up a remote mirror for a postfix server (where the content of both mail servers should be the same at any time). The idea is that if the main server comes down at some point the ...
7
votes
5answers
3k views

What is a practical way to mirror an Amazon S3 bucket?

I want to mirror my Amazon S3 buckets. I want to do this because 1) I don't want all my data only existing with one provider; and 2) in case of software error or security breach I want to have the ...
7
votes
3answers
857 views

Do disks in Raid-1 function outside of the raid?

Raid-1 is mirroring two disks (if I haven't messed up completely here :p). Does that mean that I could take one disk out and put it into another machine and it would work like a normal disk? Or does ...
7
votes
2answers
498 views

convert 1x2TB HDD with LVM into 2x2TB HDD with RAID1+LVM or with LVM mirroring?

I have Ubuntu server with 1x2TB HDD and 1x128GB SSD (unused). There are 2 partitions: /boot, and a physical volume for LVM, which has 1 group and 5 logical volumes: /, /var/log, /home, /srv, /tmp. ...
5
votes
5answers
6k views

LVM mirroring VS RAID1

Having learned a bit about LVM mirroring, I thought about replacing the current RAID-1 scheme I'm using to gain some flexibility. Problem is that according to what I found on the Internet, LVM is: ...
5
votes
4answers
644 views

Geographical DB synchronus mirroring

An architect in our company has designed a solution based on 64 bit SQL2005 Standard edition synchronous mirroring between a physical (4 quad core, 32GB RAM) server and a virtual DR server (4 virtual ...
5
votes
8answers
3k views

Looking for a small, portable, port-mirroring ethernet switch

I recently had a mac go haywire, taking half a minute or more to get www.google.com loaded. Getting its owner to give up the machine for repair was like pulling teeth - they were insisting that it ...
4
votes
2answers
5k views

include/exclude files for “scp -r”

Supposed local folder as below: /test/subfolder /test/subfolder/file1.txt /test/subfolder/page1.htm /test/subfolder/page2.htm /test/.hiddenfolder /test/./hidenfolder/file2 How to exclude ...
4
votes
1answer
2k views

What's the difference between “mirror” and “raid1” in LVM?

On the lvconvert(8) man page it says: --type SegmentType Used to convert a logical volume to another segment type or to explicitly state the desired RAID1 segment type ("mirror" ...
4
votes
3answers
1k views

Clone/Mirror Live Linux (Debian) Server

I've probably read every serverfault article on this matter, but none seems to answer my specific question or they seem like dated methods. I have a live running debian (Lenny) system on Dell ...
4
votes
1answer
4k views

SQL mirroring or log-shipping - which has the least impact on a replicated database?

We're planning a server which is a clustered SQL2005 Enterprise 64bit with a database of which a subset of tables are replicated one way via transactional replication to single subscriber located at ...
4
votes
0answers
60 views

Configure Juniper M320 as Ethernet/STM transparent converter

There is Juniper M320. We need to move ALL the traffic from one port to another. Everything that comes to one port goes to another and vice versa. No snooping or any other processing is required. One ...
3
votes
3answers
13k views

SQL 2008 Mirroring, how to failover from the mirror database?

I have configured a database mirroring setup in SQL 2008 using the High-safety, Synchronous mode, without automatic failover. I don't have a Witness instance. Regarding high availability, I ...
3
votes
3answers
2k views

Copy/Mirror traffic to WAN interfaces without “iptables tee” support

I want to copy every outgoing packet to others WAN interfaces but my iptables (v1.2.7) has not TEE target support. I wonder if there is another way (maybe using iproute2 or ebtables) to copy every ...
3
votes
6answers
5k views

Oracle real time database mirroring

Does Oracle have any built-in features to support a master-slave mirroring mechanism ? I am looking to mirror/replicate the production server on to a read-only database. The read-only database would ...
3
votes
4answers
2k views

How good is Server 2008's built-in Mirroring Solution?

I am using Server 2008 R2 on a Dell Poweredge T110 for a non-critical media server for a school. Since the PE does not have any kind of RAID capability, I am considering using Windows built in ...
3
votes
2answers
1k views

Hot swapping under RAID 1

I have a server that supports hot swapping (such as HP ProLiant DL160 G6 with hot swap) (spec) and I configure it for RAID 1 mirroring across 2 disks. Say one of the raid'ed disks then fails. Can I ...
3
votes
2answers
138 views

can I replicate systems using a RAID1 array?

I have four DL380-G5 servers. one is currently running RH5.2 using a RAID1 drive set. I want to replicate the first server to the other three. I am thinking I can yank one of the drives from the first ...
3
votes
2answers
723 views

How to handle one-way synchronization of two Oracle databases with no network connection?

Here's the situation: I have two Oracle 10g databases (with the same tables, etc.) that cannot be connected by network. At some regular intervals (say, once a day) I need to be able to update the ...
3
votes
1answer
1k views

High Availability NFS Server (Heartbeat/DRBD) long hang on clients when takeover occurs

We have a High Availability NFS environment using DRBD, heartbeat and nfs exposed to clients (Simular to the following https://help.ubuntu.com/community/HighlyAvailableNFS ). This seems to be a ...
3
votes
1answer
1k views

Can wget convert links within a local html document?

I know that wget can fetch a remote page and its dependencies and rewrite the html so that image src attributes reference the newly downloaded images. I am trying to convert local html files that ...
3
votes
1answer
659 views

iptables + TEE doesn't work correctly

On my server, I want to duplicate all the traffic to an other host. I use iptables with TEE module: iptables -t mangle -A PREROUTING -i eth0 -j TEE --gateway IP_SERVER2 I check the rule: iptables ...
2
votes
5answers
4k views

mirrored filesystem across a few servers

I'm looking for a solution to mirror or replicate one directory (or one filesystem) across a few Linux servers. Ideal solution would be one, which permits all servers read-write access. I also want it ...
2
votes
4answers
1k views

Statically mirroring a heavy trafficked site, CloudFlare as DNS

I run a fairly heavy trafficked website and due to some unfortunate incidents the machines that are in my cloud at Linode went down. And I have only a single Load Balancer machine exposed to the ...
2
votes
8answers
3k views

Windows Server Almost Real-Time Directory Replication

The environment Windows 2003 R2 Standard File server Windows 2003 Web Edition server The challenge Need a way to mirror a directory (or share) from the file server to the web server. It needs to ...
2
votes
3answers
2k views

Any disadvantages of using built-in software-RAID-1 on a Windows Server?

I have had some problems using hardware-RAID on a server. Now I'm planning to use the Windows Server built-in software-RAID-1 instead. The server will only be used for Business Administrations, so I ...
2
votes
3answers
251 views

Unix server mirroring solution

We have three servers running Ubuntu Server 10.04, load balancing between them through DNS. We use Django, nginx to serve content and PostgresQL as database. For PostgresQL, there are some mirroring ...
2
votes
3answers
1k views

User mapping lost after manual failover

I have two Microsoft SQL Server instances set up for mirroring each with a number of databases. There are a number of logins and for each database one or more user/login mappings. When I restore a ...
2
votes
1answer
158 views

Server redundancy or failsafe for small single office server

We run a local server in our office, and have a domain name pointed to it so we can test out sites we build. We also handle some image hosting for clients for emails. Since it's a single server, if ...
2
votes
4answers
2k views

How do I mirror a MySQL database?

I'm running two load balanced servers for one website, and I'd like the databases to be synchronized. Queries may be run on either of the two servers because they are both production sites, so the ...
2
votes
2answers
222 views

Login fails when using SQL Mirroring

I have a peculiar scenario where my mirrored database can't be accessed on one server but it can on the other. I've tried specifying a specific SQL login to get it working but when the database is ...
2
votes
2answers
63 views

Mirroring harddisk with compressed files with Robocopy

I tried to mirroring an existing disks on a new disks with less space. It is very important that the file structure, attributes and ACL's are exact as on the source disk. For this I tried ...
2
votes
2answers
97 views

Mirror/Cache Websites on a Mobile Server

I have been asked to determine the feasibility of mirroring or caching websites on a mobile server on a train. Unfortunately, this has been dropped on me at the last minute and I have to come up with ...
2
votes
1answer
194 views

Redundancy level on a per file basis with BTRFS?

I would like to have one storage pool with multiple disks. Raid5 for metadata of course. But for user-data I would like to set the level of redundancy on a per file or per subvolume level. Can BTRFS ...
2
votes
1answer
1k views

Mirror directory, only purging files in destination directory older than 7 days

I would like to mirror a directory, but only delete files in the destination directory older than 7 days. Situation: - Directory A is mirrored to Directory B. - A file from Directory A is deleted ...
2
votes
3answers
552 views

The best software for users internet usage

We are a small business using a Vigor 2820 as the internet router, and we'd like to install a software that could report any internet usage from our users. I already tried the "official" software ...
2
votes
4answers
455 views

Cross-server file mirroring with minimal latency

Platform: Ubuntu 10.04 x86. We have a HTTP server (nginx, but that is not relevant) which serves some static content. Content is (rarely) uploaded by content-managers via SFTP, but may be changed / ...
2
votes
1answer
37 views

How do I specify what PVs are used for mirroring when adding a mirror in LVM to an existing LV?

I've got an existing VG containing a single LV on a RHEL server that consists of a handful of SAN disks. In an effort to migrate the server to a newer SAN, I'd like to mirror the existing storage to ...
2
votes
0answers
912 views

Server 2012 (R2) - mirroring the boot drive… what is the state?

I struggle to find modern documentation here. So far we have been booting our servers from the main RAID controllers. Worked nice, but not we get the first of a new generation that hs in the back 2 ...
2
votes
1answer
122 views

For a simple replication over 2 server computers, should I use glassfish replication or ubuntu replication, or something else?

I want to set up a simple replication or exact mirroring, using 2 server computers I just bought, for the following purpose: I want to set up some websites, which, by design, may eventually need to ...
2
votes
2answers
52 views

Raid controller for an old server [closed]

I'm trying to find a PCI Raid controller for an old machine that only has 64bit/33MHz PCI slots. It's now being used as a file server and uses a couple of old PATA drives with Windows Server ...
2
votes
2answers
281 views

internet radio mirror

I have to create a local (LAN) 'mirror' for specific internet radio station (mp3 stream wrapped in http, basically they broadcast mix of freely avialable podcasts, legal side is not a problem). So I ...
2
votes
2answers
327 views

RAID1 Broken Mirroring

I'm having a little server with Windows Small Business Server 2003. I'm using RAID1, via a HighPoint Rocket RAID 1640 RAID-card, using two harddrives. This week the server alarmed, and durig reboot I ...
2
votes
3answers
1k views

The --reject feature in wget doesn't seem to work

I am trying to mirror most of a ftp sever using wget. This particular sever keeps old copies of the data files in a folder called 'backup' inside every subfolder. e.g. '/MaffiaOffShore/backup' ...
1
vote
2answers
167 views

Using rsync and which directories should I place in my exclude file when using rsync?

I would like to use a CentOS VM for a mirrored full backup of my CentOS mail server. Both are the same version and are up-to-date. I have found that without excluding certain directories the VM backup ...
1
vote
2answers
154 views

Database Snapshots of Mirrored databases affect performance of Principal database?

I have 2 servers set in Mirroring High-safety. One is Principal and another in Mirror. Currently I have 2 snapshots of a Production database (100 GB size) created on Principal server (for no_lock ...
1
vote
5answers
5k views

How do I mirror a folder (copy only missing and changed files recursively) in windows?

I'm trying to find a fast way to recursively update a folder and all subfolders from another folder. Obviously, a full delete and Xcopy would work but that is very slow. After the update, the ...
1
vote
4answers
186 views

MS Sql Server Mirroring

We are looking at mirroring a MS SQL database (for a web application) due to the unique way the application was developed, each user has a SQL server Login user account which has permissions to our ...
1
vote
2answers
1k views

How to create a Mirror of an NFS Share?

For back-up and restoration purposes the purpose of retiring an old server, I will need to create a perfect mirror image of an NFS share. This mirror is not a simple re-direct, but rather, an exact ...