i do wish to read study learn from linux world. sites to refer always for command, practice,tutorials etc.say like replication data os level from 1 pc to other pc,without using any outside linux software, only os level, linux to linux, linux to windows/macchannel bonding, using 2 network ethernet card, double the speed of network card and failover netowkr card alsosyncronize data 1pc to 2pc
View 1 RepliesIn playback application i guess "snd_pcm_lib_write1" is the function call used to write the audio data to sound card at kernel level.If that is true. how can i send the same audio data at kernel level to other system connected over LAN.
View 1 Replies View Relatedhello everyone, im having a problem when my computer enters in the run level 4 as the default when i start slackware. The strange thing is that it not seems that is a X window problem, it looks like more like a configuration problem in some part of the kde script to initialize the log in, because if i manually start the X service it works fine, i dont know what is the source. Thank you in advance for the help.
View 3 Replies View RelatedI have a directory that has a another directory inside it. The top directory is rather redundant since it only contains the one other one. Is there a way to delete the top level directory and have the contents simply "move up a level"?
View 6 Replies View Relatedi had configured a MySQl Replication Server with 2 DB Servers.Now we are planning to implement a failover Scenario.If Master fails The slave should act as a Master and we have a addition server.It will be going to act as slve.i had mentioned the points below..
Replication
(Master Server)----->----(Slave Server)-----------(Additional Server)
DBS 1 DBS 2 DBS 3
1.Replication is made between Master (DBS 1) and Slave (DBS 2) (successfully done)
2.If Master (DBS 1) failed Slave (DBS 2) should act as a Master and Additional Server (DBS 3) needs to be Slave
3.Whenever Orginal Master (DBS 1) became online the current Master ie ..Slave (DBS 2) should go back to Slave position and all lost data will be replicated to Master DBS 1.
I configured a master DNS server 192.168.2.10 working OK. After that I configure a DNS Slave Server (92.168.2.11)the initial replication worked fine. This is test environment for my certification. I see how the zones from my master are transferred
zones in Master
training.com.db
transferred zone to my slave when I started named service
sec.training.com.db
That's Ok but I added some IPs to resolve to my master zone
webserver IN A 192.168.2.30
fileserver IN A 192.168.2.31
I restart/reload named on master and after that I go to slave and restart/reload but zones wuth the new values are not replicated. How long does it take for slave to take the changes from master? how is the procedure manual or automatic? I see If I go to slave and delete sec.training.com and restart named the zone with the changes is transferred but that is very manual... I am including my DNS Configuration so you can take a look.
I am IT Manager. Currently I am responsible for a mostly IBM shop, running a mix of AIX, OS/400. VMware, and Windows.
My P-series running AIX and Oracle and my AS/400 both back up to tape drives daily.
But my VMware system is not being backed up, the virtual machines are, but my tape drive just broke down.
I just ordered a server grade machine with an i5 CPU, running 3 2TB SATA drives in RAID5, this is going to be my new backup server.
I am hoping I can put Linux on it, and some sort of open source file replications, real time backup software that will back up my Windows servers, and my Windows desktops in real time.... any sort of animal exist?
I had Configured a MySQL Master-Slave replication.It seems that the binary logs steals so much space of My storage.
i.)My Master
show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000144 | 475823 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
ii.)My Slave.
mysql> SHOW SLAVE STATUSG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.277.55.141
[code]....
If i remove all binary files up tp mysql-bin.000144 using "PURGE",will it affect my existing database/any data loss.
My MySQL replication slave failed,while reading a large size table from master.Thhe information from error.logError 'Unknown table engine 'InnoDB'' on query. Default database: 'test'. Query: I am sure that table is a Big size table..
View 11 Replies View RelatedI've been able to kludge a kill script which finds the correct pid for the kdeserver (or gnome server) after my system comes up in run level 5 so I can drop back to run level 3 mode. Lots of experimentation showed me that using telinit 3 and telinit 5 would occasionally leave the video memory in a mess and I would have the black screen of death.
I set the security parameter setting to autologin for me since I am the only user of my machine, but I still have to kludge the default setting under sysconfig (the DEFAULT_WM) under Window Manager to pick a certain window manager, so it takes time to manually switch the desktop.
Right now I can leave the gui and drop back to cli, but painful experimenting showed me that killing the X server is a no no. Right now I kill the kde server, which sends the SIGTERM to the X windows manager, which then figures out that it has to shut down.
Questions: Is there a better way of doing this? Apparently openSUSE figures that we have multiple users logging into the gui desktop, so the gui is always kept running and a login window with the desktop manager option forces the user to login in. With autologin, this never happens, but no choice of desktop is possible on the fly.
Can some type of script be set up to painlessly enable this to happen? And what is the best way of bringing either the Gnome or KDE desktop manager down gracefully? I do get lots of error messages as the system attempts to recover and X shuts down. It appears that apparently the single user with autologin is left out in the cold.
I want to install a software called TinyOS which is an operating system designed for wireless sensor embedded networks in my account. The problem is it has instructions to install the software as an administrator since i'm not an admin of the department network i can not able to install. Is there any method to install this software as an user level rather than admin level.
View 3 Replies View RelatedHow can I adjust the levels at which the battery is considered to be critically low?ight now it seems this is set at 5 or 10%. I want to make it 20 or 25%This is for Gnome. I am using Lucid x86
View 1 Replies View RelatedI want to know what are the advantages and disadvantages for accessing spi(serial peripheral inerface )from kernel level and user level. like methods of doing it, speed ,memeory utilization etc
View 1 Replies View Related[code]...
you can find a cutout of an output generated by "iwlist s" command for a cell. Does anybody know what Quality, Signal level and Noise level mean? What is the definition of them? I searched for it and could not find good information on it. What do these Extra:*** fields for? What does it show in the example above? How were those values computed?
[code]...
Hi Guys,
here is my scenario:
I am running F10 x86_64 with Nvidia Quadro FX 3400.
I installed the drivers and it worked just fine. No errors generated according to Nvidia log files.
However, while in run level 5 when I try to switch to run level 3 by typing "telinit 3" or "init 3" the X server goes down and I get a blank screen. Same thing happens when I try to switch to a different tty session by <ctrl>+<alt>+F2 (or any F key for that matter).
I also noticed that when I shut down my system I can't see any more the screen where services are shutting down and their status ([OK] or [failed]).
Would appreciate your help on solving this issue.
Hey Guys, I'am new here and request your help on this:
After installing emacs and a few dependencies on my RHEL 5, on restarting the system, the keyboard was not able to work. I restarted several times in vein.
However, when I start in single mode, it works perfectly. I have tried looking for a solution from google, but in vein.
Kindly help...
Regards, Andrew
I'm running RHEL 5.5 on two workstation for test DRBD and I get something that sound strange ...[URL] Quote:Protocol C. Synchronous replication protocol. Local write operations on the primary node are considered completed only after both the local and the remote disk write have been confirmed. As a result, loss of a single node is guaranteed not to lead to any data loss. Data loss is, of course, inevitable even with this replication protocol if both nodes (or their storage subsystems) are irreversibly destroyed at the same time. By far, the most commonly used replication protocol in DRBD setups is protocol C.
View 15 Replies View RelatedA few months ago I have setup a server with three hard disks. The partition mapping the disks as follows:
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x7ca36fee
[code]....
Now I have the following problem the LVM file system don't mount properly.If I open the mount point I see only a few files of the LVM disk. If I want to unmount the disk I get the following error:
umount /data/
umount: /data/: not mounted
If I want to mount the volume I get the following error:
mount -a
mount: /dev/mapper/gegevens-Data already mounted or /data busy
I have a fedora 8 server and I just wanted to install fedora directory server I got it install and running, but I'm unable to check the replication and also it seems that I has no database when I user fedora-console-idm.[URL].. Also the same thing happens at the web tool. Any ideas? I think there is no db set, but I have no idea how to do this on fedora-ds. I'm new to it.
View 1 Replies View RelatedI am using Debian as mail server and proxy server. I need to configure one backup server for the same. Mainly I need to replicate/sync the files on both machines. So I can avoid the failure time.
View 3 Replies View RelatedHow to directory replication between 2 or more servers?
View 1 Replies View RelatedIf I have 2 MySQL server and I want to replicate their database to only 1 server, is it possible? I cannot afford to have master-to-master only because I still need to replicate one more machine but I do not have anymore more machine for replication so I'm thinking if these 2 MySQL server can be replicate to only 1 machine. If this is not possible, I guess I've no choice but to have two mysql daemon on that machine
View 5 Replies View RelatedI have been scripting Inotify to work as file replication.It works very well for casual use when editing or uploading files. But I have to make sure it stands up against a "tar bomb" when we install a new package. EG: tar -xzf really_big_php_project.tar.gz
Code:
#!/bin/sh
# get the current path
[code]....
I have been using OpenLDAP 2.4 with OpenSuse 11 without any issues but I now want to configure replication and can't see how it's done . The OpenLDAP 2.4 admin guide refers to the slapd.conf configuration file but this is not used by YaST.
View 4 Replies View RelatedI'm thinking of producing a website for a project at uni which would resemble the brainstorm website [URL]. I plan to write it in PHP with a mysql database. How I could start to plan such a project, suggest any PHP frameworks which may make the job easier, any code already available to start me off etc??
View 1 Replies View RelatedMight this is silly question but I am not much familiar to database.I am doing master slave Mysql replication for load balancing. On master server different database has different user privileges. I create backup using mysqldump command and restore on slave server instead of using load data from master; command.When i replicate database from master to slave will i require to set user privileges same as master ?One more question: How to lock all database in mysql?
View 2 Replies View RelatedI want to copy a file to all RHQ-Agents through out RHQ-Console.
View 1 Replies View Relatedi would like to know how to setup Samba file replication between two Opensuse 10.3 servers,
View 7 Replies View RelatedI have two computers (one tower, one laptop). On both the computers, I have apache & PHP & mysql running, so i can program/script anywhere I like. With a simple sync'ing program, the PHP scripts are synced between the PC's, thought the databases arent. Therefor I'm looking for a method to sync (replicate) the databases between the PC's. thought after setting up some configuration, i'm stuck... now with how to, but what to
Option 1) Multi-master replication between the PC and the laptop. With this setup, the database can ONLY sync once both the devices are turned on. Also it can only sync if they are turned on on my LAN, since they do not have an external static IP address. if I turn on both PC's on my LAN, with static IP's (from the DHCP server), this option will work. Thought, I basically never have both pc's turned on in my own home... cuz i can use only one at the time anyway.So I was thinking of another setup
Option 2) Multi-master replication with: online Server, PC and Laptop. The server basically contains the most up to date database. for example, the laptop updates the server and the server can update the PC later, once the PC is turned on. Also the other way around, the PC can update the server which can than update the Laptop.
There is, if i'm correct, only one problem: the only multi master replications setups I found, use a circulair setup... (1 updates 2, 2 updates 3, 3 updates 1) What I need is to have the PC update the server, but ALSO have the server update the PC (same for the laptop)
than there is another (little) problem: the PC and laptop cannot be reached from behind the modem, nor do they have a static IP. My question: Is it possible to sync the server with the laptop (that has no static IP), the laptop with the server (that has a static IP), and the same for the PC
PC <====> Server <====> Laptop
I am looking into setting up replication in a production environment but currently this is on two test machines. I am following the documentation at [URL] but I am unable to get past "16.1.1.10 Setting the Master Configuration on the Slave". When I do the CHANGE MASTER TO I am getting a syntax error for some reason. What am I doing wrong? These servers run "CentOS release 5.5 (Final)" and "MySQL 5.0.77-log Source distribution" installed via yum. The only changes from default are that I created a single database on the master before doing the table lock and dump, then everything else has been done exactly to what the documentation states, but is still failing.
The option skip-networking is not in the config file on either server and neither one runs SELinux or any firewall.
mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.1.220'
-> MASTER_USER='repl'
-> MASTER_PASSWORD='removed'
[Code]....