Montag, 4. Mai 2015

Performance Samsung SSD vs Seagate Hybrid Drives

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I have 2 disks in my laptop Samsung ssd and normal HDD. The second disk mostly used as a storage rather than fast io disk. It was going bad...
Freitag, 6. Februar 2015

OVIRT engile unable to import old "Export storage": How to fix

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WARNING: before to start this tests, backup your datacenters,storages, config files etc..!!!   After reinstall ovirt 3.5.x I got followin...
Mittwoch, 1. Oktober 2014

sysbench: benchmark your mysql storage

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0) yum install sysbench -y  1) mysql -uroot -e "CREATE SCHEMA sbtest;" 2)  sysbench --db-driver=mysql --test=oltp --num-threads=...
Donnerstag, 18. September 2014

cli ansible vs clustershell : running commands on multiple hosts.

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Let us start with CentOS 6.5 1) enable epel:  yum locainstall -y  http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noa...
1 Kommentar:
Mittwoch, 17. September 2014

OpenSM lid and more...

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On centOS 6.5 yum groupinstall "Infiniband Support" yum install infiniband-diags Infiniband diagnostics tools are containing n...

Fix infiniband QDR or FDR troubles on fat memory machines.

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Fix memory trouble on FAT machines: The formula to computer the maximum value of pagepool when using RDMA is:    2^log_num_mtt  x  2^log_mtt...

CentOS 7 after install:

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CentOS 7 is different management than CentOS 5.x and 6.x. It is uses systemctl to manage services. systemctl enable sshd systemctl list-u...