December 2002
Intermediate to advanced
260 pages
9h 18m
English
Content preview from Managing RAID on LinuxBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Case 1: HTTP Image Server
Because RAID-1 supports parallel reads, it makes a great HTTP image server. Companies that sell products online and provide product photos to web surfers could use RAID-1 to serve images. Images are static content, and in this scenario, they will likely be read quite a bit more than they will be written. Although new product photos are frequently added, they are written to disk only once by a web developer, whereas they are viewed thousands of times by potential customers. Parallel read performance on RAID-1 helps facilitate the large number of hits, and the write performance loss with RAID-1 is largely irrelevant because writes are infrequent in this case. The redundancy aspect of RAID-1 also ensures that downtime is minimal in the event of a disk failure, although parallel read performance will be temporarily lost until the drive can be replaced. Using a hot-spare, of course, ensures that performance is affected for only a brief time.
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