Linux – Page 14 – Margus Roo

Linux LVM/dmraid simple how to

Posted on May 18, 2010 - April 13, 2011 by margusja

Esiteks loome lvm manageri jaoks füüsilised kettad.

[root@localhost ~]# pvcreate /dev/sda6 /dev/sdb /dev/sdc /dev/sdd

Physical volume “/dev/sda6” successfully created

Physical volume “/dev/sdb” successfully created

Physical volume “/dev/sdc” successfully created

Physical volume “/dev/sdd” successfully created

Järgmiseks loome volumegrupi:

[root@localhost ~]# vgcreate vg1 /dev/sda6 /dev/sdb Volume group “vg1” successfully created

Viimaks loome loogilise grupi 🙂

[root@localhost ~]# lvcreate –name lv1 –size 500G vg1 Logical volume “lv1” created

Esiteks on tarvis luua dmaraid. Listi kasutatavatest ketastest saab
[root@bacula hpt374]# dmraid -r /dev/sdd: hpt45x, "hpt45x_cdhfdagge", mirror, ok, 1953525157 sectors, data@ 0 /dev/sdb: hpt45x, "hpt45x_cdhfdagge", mirror, ok, 1953525157 sectors, data@ 0 /dev/sdc: hpt45x, "hpt45x_bhgfhhjhhf", mirror, ok, 1953525157 sectors, data@ 0 /dev/sda: hpt45x, "hpt45x_bhgfhhjhhf", mirror, ok, 1953525157 sectors, data@ 0 [root@bacula hpt374]#
Antud juhul on näha, et kettad tulevad läbi hpt45 driveri. RocketRaid-1640

Juba kasutuses olevad raid-id
[root@bacula hpt374]# ls -lah /dev/mapper/ total 0 drwxr-xr-x. 2 root root 200 2010-05-18 12:18 . drwxr-xr-x. 18 root root 3.7K 2010-05-18 12:18 .. crw-rw----. 1 root root 10, 62 2010-05-18 11:42 control brw-rw----. 1 root disk 253, 3 2010-05-18 12:07 hpt45x_bhgfhhjhhf brw-rw----. 1 root disk 253, 0 2010-05-18 11:42 hpt45x_cdhfdagge brw-rw----. 1 root disk 253, 1 2010-05-18 11:42 hpt45x_cdhfdaggep1 brw-rw----. 1 root disk 253, 2 2010-05-18 11:42 hpt45x_cdhfdaggep2 brw-rw----. 1 root disk 253, 6 2010-05-18 12:25 vg0-tank_backup_storage brw-rw----. 1 root disk 253, 4 2010-05-18 11:42 VolGroup-lv_root brw-rw----. 1 root disk 253, 5 2010-05-18 11:42 VolGroup-lv_swap [root@bacula hpt374]#

Loome pardatsiooni(d)
[root@bacula hpt374]# fdisk /dev/mapper/hpt45x_bhgfhhjhhf Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel with disk identifier 0xbbfea9d9. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable.The number of cylinders for this disk is set to 121601. There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e.g., old versions of LILO) 2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK) Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)Command (m for help): pDisk /dev/mapper/hpt45x_bhgfhhjhhf: 1000.2 GB, 1000204880384 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xbbfea9d9


Device Boot      Start         End      Blocks   Id  System
Command (m for help): n

Command action

e   extended

p   primary partition (1-4)

p

Partition number (1-4): q

Partition number (1-4): 1

First cylinder (1-121601, default 1):

Using default value 1

Last cylinder, +cylinders or +size{K,M,G} (1-121601, default 121601):

Using default value 121601
Command (m for help): p
Disk /dev/mapper/hpt45x_bhgfhhjhhf: 1000.2 GB, 1000204880384 bytes

255 heads, 63 sectors/track, 121601 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Disk identifier: 0xbbfea9d9
Device Boot      Start         End      Blocks   Id  System

/dev/mapper/hpt45x_bhgfhhjhhf1               1      121601   976760001   83  Linux
Command (m for help): t

Selected partition 1

Hex code (type L to list codes): L
0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris

1  FAT12           39  Plan 9          82  Linux swap / So c1  DRDOS/sec (FAT-

2  XENIX root      3c  PartitionMagic  83  Linux           c4  DRDOS/sec (FAT-

3  XENIX usr       40  Venix 80286     84  OS/2 hidden C:  c6  DRDOS/sec (FAT-

4  FAT16 <32M      41  PPC PReP Boot   85  Linux extended  c7  Syrinx

5  Extended        42  SFS             86  NTFS volume set da  Non-FS data

6  FAT16           4d  QNX4.x          87  NTFS volume set db  CP/M / CTOS / .

7  HPFS/NTFS       4e  QNX4.x 2nd part 88  Linux plaintext de  Dell Utility

8  AIX             4f  QNX4.x 3rd part 8e  Linux LVM       df  BootIt

9  AIX bootable    50  OnTrack DM      93  Amoeba          e1  DOS access

a  OS/2 Boot Manag 51  OnTrack DM6 Aux 94  Amoeba BBT      e3  DOS R/O

b  W95 FAT32       52  CP/M            9f  BSD/OS          e4  SpeedStor

c  W95 FAT32 (LBA) 53  OnTrack DM6 Aux a0  IBM Thinkpad hi eb  BeOS fs

e  W95 FAT16 (LBA) 54  OnTrackDM6      a5  FreeBSD         ee  GPT

f  W95 Ext'd (LBA) 55  EZ-Drive        a6  OpenBSD         ef  EFI (FAT-12/16/

10  OPUS            56  Golden Bow      a7  NeXTSTEP        f0  Linux/PA-RISC b

11  Hidden FAT12    5c  Priam Edisk     a8  Darwin UFS      f1  SpeedStor

12  Compaq diagnost 61  SpeedStor       a9  NetBSD          f4  SpeedStor

14  Hidden FAT16 <3 63  GNU HURD or Sys ab  Darwin boot     f2  DOS secondary

16  Hidden FAT16    64  Novell Netware  af  HFS / HFS+      fb  VMware VMFS

17  Hidden HPFS/NTF 65  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE

18  AST SmartSleep  70  DiskSecure Mult b8  BSDI swap       fd  Linux raid auto

1b  Hidden W95 FAT3 75  PC/IX           bb  Boot Wizard hid fe  LANstep

1c  Hidden W95 FAT3 80  Old Minix       be  Solaris boot    ff  BBT

1e  Hidden W95 FAT1

Hex code (type L to list codes): 8e

Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): p
Disk /dev/mapper/hpt45x_bhgfhhjhhf: 1000.2 GB, 1000204880384 bytes

255 heads, 63 sectors/track, 121601 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Disk identifier: 0xbbfea9d9
Device Boot      Start         End      Blocks   Id  System

/dev/mapper/hpt45x_bhgfhhjhhf1               1      121601   976760001   8e  Linux LVM
Command (m for help): w

The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 22: Invalid argument.

The kernel still uses the old table. The new table will be used at

the next reboot or after you run partprobe(8) or kpartx(8)

Syncing disks.

Loome “Physical volume”
[root@bacula hpt374]# pvcreate /dev/mapper/hpt45x_bhgfhhjhhf Physical volume "/dev/mapper/hpt45x_bhgfhhjhhf" successfully created

Loome “Volume group”
[root@bacula hpt374]# vgcreate -s 16M vg0 /dev/mapper/hpt45x_bhgfhhjhhf Volume group "vg0" successfully created

Loome “Logical volume”
[root@bacula hpt374]# lvcreate -L 700G -n tank_backup_storage vg0 Logical volume "tank_backup_storage" created

C++ (cpp) lihtne UI

Posted on March 30, 2010 - March 30, 2010 by margusja

Pole ammu c++ maailmas midagi teinud. Alati on hea võtta endale eesmärk. Mina võtsin eesmärgiks luua lihtne mäng. Milline mäng seda ma veel ei tea. Kindel oli see, et ma vajasin kasutajaliidest. Kuna alustada on (mulle vähemalt meeldib) ilma väga suurte graafiliste objektideta siis minu kasutajaliides on käsurea oma. Aga asjast.

Hetkel koosneb app neljast failist:

UI siis selline:

.section .data string: .ascii "Hello world %d \n\0";


.section .text

.globl _start

_start:

movl  %esp, %ebp

subl  $4, %esp
movl $10000, %eax

movl $0, %ebx
loop:

cmpl $0, %eax

je loop_end

subl $1, %eax

pushl %eax

pushl $string

call printf

addl $4, %esp

popl %eax

jmp loop
loop_end:
movl $1, %eax  
movl $0, %ebx

int $0x80
real 0m0.424s
user 0m0.004s
sys 0m0.254s

PHP

real 0m0.969s user 0m0.034s sys 0m0.219s } ?>


Perl



for ($count=0; $count<10000; $count++) {
        print "Hello World\n";
}


real	0m0.547s

user	0m0.014s

sys	0m0.267s
Python



#!/usr/bin/python

# Filename: hello.py

for i in range(0, 10000):

        print "Hello, World!"

else:

        print 'The for loop is over'



real	0m0.503s

user	0m0.018s

sys	0m0.273s



	
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		Some useful MySql sentences
		
			Posted on January 15, 2010 - January 4, 2011 by margusja		

			


	
		start in  safe mode
/usr/bin/mysqld_safe –user=mysql –socket=/var/lib/mysql/mysql.sock –pid-file=/var/run/mysqld/mysqld.pid –datadir=/var/lib/mysql –skip-grant-tables &
It is annoying to type them from the scratch every time. So a little copy paste place for my. Lazy me!
insert into user (Host, User, Password) Values (‘localhost’, ‘username’, PASSWORD(‘xxx’));
insert into db (Host, Db, User, Select_priv, Insert_priv, Update_priv, Delete_priv) values (‘localhost’, ‘dbname’, ‘username’, ‘Y’, ‘Y’, ‘Y’, ‘Y’);
UPDATE `mysql`.`user` SET `Create_priv` = ‘Y’,

`Drop_priv` = ‘Y’,

`Reload_priv` = ‘Y’,

`Shutdown_priv` = ‘Y’,

`Process_priv` = ‘Y’,

`File_priv` = ‘Y’,

`Grant_priv` = ‘Y’,

`References_priv` = ‘Y’,

`Index_priv` = ‘Y’,

`Alter_priv` = ‘Y’,

`Show_db_priv` = ‘Y’,

`Super_priv` = ‘Y’,

`Create_tmp_table_priv` = ‘Y’,

`Lock_tables_priv` = ‘Y’,

`Execute_priv` = ‘Y’,

`Repl_slave_priv` = ‘Y’,

`Repl_client_priv` = ‘Y’,

`Create_view_priv` = ‘Y’,

`Show_view_priv` = ‘Y’,

`Create_routine_priv` = ‘Y’,

`Alter_routine_priv` = ‘Y’,

`Create_user_priv` = ‘Y’ WHERE CONVERT( `user`.`Host` USING utf8 ) = ‘h3.okia.ee’ AND CONVERT( `user`.`User` USING utf8 ) = ‘root’ LIMIT 1 ;
	


	
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		VIM + SVN
		
			Posted on December 4, 2009 by margusja		

			


	
		
	


	
		Posted in Linux	




	
		cifs ja apache
		
			Posted on November 26, 2009 by margusja		

			


	
		Selline lugu juhtus täna.
Tahtsin ühte NAS serveri sharet mis oli mounditud cifs võtmega, apache kaudu serveerida. Asi nagu peaaegu õnnestus. Faile sai näha ja puha. Aga kui hakkata alla laadima siis tuleb 0 biti. 
TCP liikluse analüüs ka targemat miskit ei andnud:


GET /path/to/file HTTP/1.1

User-Agent: Opera/9.80 (Macintosh; Intel Mac OS X; U; en) Presto/2.2.15 Version/10.10

Host: ftp.example.com

Accept: text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1

Accept-Language: en,ja;q=0.9,fr;q=0.8,de;q=0.7,es;q=0.6,it;q=0.5,pt;q=0.4,pt-PT;q=0.3,nl;q=0.2,sv;q=0.1,nb;q=0.1,da;q=0.1,fi;q=0.1,ru;q=0.1,pl;q=0.1,zh-CN;q=0.1,zh-TW;q=0.1,ko;q=0.1

Accept-Charset: iso-8859-1, utf-8, utf-16, *;q=0.1

Accept-Encoding: deflate, gzip, x-gzip, identity, *;q=0

Authorization: Basic dGFua2NsaWVudDpNaW5nZVRhbmtpMDAxsad3

Connection: Keep-Alive, TE

TE: deflate, gzip, chunked, identity, trailers

HTTP/1.1 200 OK

Date: Thu, 26 Nov 2009 11:33:48 GMT

Server: Apache

Last-Modified: Thu, 21 May 2009 12:37:30 GMT

ETag: "3830e7-f19ac-46a6b68415680"

Accept-Ranges: bytes

Content-Length: 989612

Keep-Alive: timeout=10, max=5

Connection: Keep-Alive

Content-Type: text/plain


Kogu moos.
siis selgus et see on vana hea tundud probleem ja lahenduse annab apache virtuali konfis: EnableSendfile Off
	


	
		Posted in Linux	




	
		Some xen guest creating hints
		
			Posted on November 23, 2009 - November 26, 2009 by margusja		

			


	
		lvcreate -L 500M -n vm22.swap vg
lvcreate -L 10G -n vm22.root vg
lvcreate -L 20G -n vm22.var vg
mkfs.ext3 /dev/vg/vm22.root 
mkfs.ext3 /dev/vg/vm22.var 
mkswap /dev/vg/vm22.swap 
mkdir /mnt/var
mkdir /mnt/proc
mkdir /mnt/sys
mount /dev/vg/vm22.root /mnt/
mount /dev/vg/vm22.var /mnt/var
cd /mnt/
tar -zxvf /root/f11-x86_64-base.tar.gz 
rm f11-x86_64-base.tar.gz 
vim ./etc/sysconfig/network
vim ./etc/sysconfig/network-scripts/ifcfg-eth0
vim ./etc/fstab
vim ./etc/sysconfig/network-scripts/ifcfg-eth0:1
vim ./etc/hosts
umount /mnt/var/
cd /
umount /mnt/
cd /etc/xen/auto/
cp vm21 vm22
vim vm22 
xm create -c /etc/xen/auto/vm22 
	


	
		Posted in Linux	




	
		Apache seadete olulisus
		
			Posted on November 18, 2009 by margusja		

			


	
		Allpool on näha ühe serveri mälukasutuse graafik. Kuni punase jooneni kadus vaba mälu mis ei ole linux kerneli puhul midagi erilist, pigem hea. Samas on näha et ei cachetud mälu mis on aga väga halb.

Kuni punase kriipsuni olid apache seaded default. Peale seda seadistasin apache serverit ning peale punast kriipsu on ka tulemus. Minu arust päris hea.

	


	
		Posted in Linux	



	
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Category: Linux

Linux LVM/dmraid simple how to

C++ (cpp) lihtne UI

Nii, stabikas läinud!

Mäluboss

Hello World in different languages and speed

Some useful MySql sentences

VIM + SVN

cifs ja apache

Some xen guest creating hints

Apache seadete olulisus