“It is well enough that people of the nation do not understand our banking and monetary system, for if they did, I believe there would be a revolution before tomorrow morning.”
– Henry Ford
Apache 2.4 overview
Good news from apache – Many new features and enhancements has been integrated in the development version of the next Apache.
By the way on my birhday on 7th of march was apache 2.3.11-beta released, With nice features:)
[Read more…]
RAID 6
A RAID 6 is another form of parity protection for disks. Called dual parity too.
Requirements: 4 Disks
Capacity: (Size of Smallest Drive) * (Number of Drives – 2)
Read: Very good read performance
Write: Poor write performance due to dual parity overhead and complexity
For this RAID level you should use a hardware controller.
RAID 5
A RAID 5 uses block-level striping with parity data distributed across all member disks.
Requirements: At least 3 drives
Fault Tolerance: (N – 1) Can tolerate loss of one drive
Capacity: (Size of Smallest Drive) * (Number of Drives – 1)
RAID 1
RAID 1 – Mirroring without parity or striping.
– Minimum disks: 2
– Data redundancy (mirror)
– One disk may fail
– Effective protection against physical disk failure
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