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Running Systems

(and me chasing them)

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Running Systems
(and me chasing them)

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Clusters | Disk Storage | Linux

Raw devices for Oracle on RedHat (RHEL) 5

Byetzion 21/10/2008

There is a major confusion among DBAs regarding how to setup raw devices for Oracle RAC or Oracle Clusterware. This confusion is caused by the turn RedHat took in how to define raw devices. Raw devices are actually a manifestation of character devices pointing to block devices. Character devices are non-buffered, so they act as…

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Linux

Minimal Centos5 and SSH Server with X forwarding

Byetzion 10/10/2008

Installation of minimal selection of Centos 5 – only base, core and dialup selections, will leave a small-sized system, with the minimum required. This is a good setup to start setting up a firewall, and it lets you add any required package later using ‘yum’. This said, you cannot forward X over SSH at this…

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Disk Storage | Linux

iSCSI target/client for Linux in 5 whole minutes

Byetzion 04/12/2007

I was playing a bit with iSCSI initiator (client) and decided to see how complicated it is to setup a shared storage (for my purposes) through iSCSI. This proves to be quite easy… On the server: 1. Download iSCSI Enterprise Target from here, or you can install scsi-target-utils from Centos5 repository 2. Compile (if required)…

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Linux

RHEL3 Kickstart on Itanium (IA64)

Byetzion 16/06/2007

Recently I have installed several Redhat systems on IA64 platforms. Since it required only slight adjustments, and since there were two sets of systems, RHEL3 Update2 and RHEL4 Update3, I have decided to use Kickstart for both, each with his own ks.cfg file. For lack of any other explanation at the moment, I can only…

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Disk Storage | Linux

net-snmp broken in RHEL (and Centos, of course) – diskio

Byetzion 09/06/2007

I’ve had a belief for quite a while now that Linux, unlike other types of systems, was unable to produce any I/O SNMP information. I only recently found out that it was partially true – all production-level distros, such as RedHat (and Centos, for that matter) were unable to produce any output for any SNMP…

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