Kh. Yeung et Ts. Yum, DYNAMIC PARITY LOGGING DISK ARRAYS FOR ENGINEERING DATABASE-SYSTEMS, IEE proceedings. Computers and digital techniques, 144(5), 1997, pp. 255-260
RAID (redundant arrays of inexpensive disks) has gained much attention
in the recent development of fast I/O systems. Of the five levels, th
e traditional mirrored disk array still provides the highest I/O rate
for small 'write' transfers. This is because the mirrored disk array h
as no small 'write' problem which is found in other levels of RAID. Th
e authors propose a novel RAID architecture for fast engineering datab
ase systems, called dynamic parity logging (DPL) disk array. DPL disk
array has no small 'write' problem and can provide much higher 'write'
throughput than other RAID architectures. DPL disk array also has jou
rnalling capability: which means that some older design versions are k
ept for future references. A queueing model for DPL disk array is buil
t. Analytical results, supported by simulation, show that the DPL disk
array can provide the highest 'write' throughput when compared to RAI
D levels 1, 4, and 5.