Name: Anonymous 2006-06-22 20:17
setting up a raid 5 and i've come across an option about my cache policy. it says i can choose between eeither Write-Back or Write-Through
Write Back:when the write-back setting is selected, all write requests sent to the array are cached. This will result in higher performance, but data loss may occur in case of a power failure.
Write Through: when the write-through setting is selected, all write requests sent to the array are psased directly to the disks. However, subsiquent reads may still be completed from the cache if appropriate.
i dont like the sound of the data loss part on the write back, but then again an increase in performance would be nice. donno how the second option works though.
anyone got any advice on which i should choose?
Write Back:when the write-back setting is selected, all write requests sent to the array are cached. This will result in higher performance, but data loss may occur in case of a power failure.
Write Through: when the write-through setting is selected, all write requests sent to the array are psased directly to the disks. However, subsiquent reads may still be completed from the cache if appropriate.
i dont like the sound of the data loss part on the write back, but then again an increase in performance would be nice. donno how the second option works though.
anyone got any advice on which i should choose?