RAID Level 0: Striping
Explore RAID 0 striping used in redundant disk arrays to improve capacity and performance by spreading data across disks. Understand how data blocks are mapped, how chunk size affects throughput, and analyze RAID 0's reliability limitations and performance under sequential and random workloads.
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The first RAID level is actually not a RAID level at all, in that there is no redundancy. However, RAID level 0, or striping as it is better known, serves as an excellent upper-bound on performance and capacity ...
From the figure above, you get the basic idea: spread the blocks of the array across the disks in a round-robin fashion. This approach is designed to extract the most parallelism from the array when requests are made for contiguous chunks of the array (as in a large, sequential read, for example). We call the blocks in the same row a stripe; thus, blocks 0, 1, 2, and 3 are in the same stripe above.
In the example, we have made the simplifying assumption that only 1 block (each of say size 4KB) is placed on each disk before moving on to the next. However, this arrangement need not be the case. For example, we could arrange the blocks across disks as shown in the figure below:
In this ...