Name
Abstract | ||
|---|---|---|
Freeblock scheduling replaces a disk drive's rotational latency delays with useful background media transfers, potentially allowing background disk I/O to occur with no impact on foreground service times. To do so, a freeblock scheduler must be able to very accurately predict the service time components of any given disk request - the necessary accuracy was not previously considered achievable outside of disk firmware. This paper describes the design and implementation of a working external freeblock scheduler running either as a user-level application atop Linux or inside the FreeBSD kernel. This freeblock scheduler can give 15% of a disk's potential bandwidth (over 3.1MB/s) to a background disk scanning task with almost no impact (less than 2%) on the foreground request response times. This can increase disk bandwidth utilization by over 6 x. |
Year | Venue | Keywords |
|---|---|---|
2002 | FAST | disk firmware,freeblock scheduling |
Field | DocType | ISBN |
Disk buffer,Computer science,Scheduling (computing),Disk encryption hardware,Logical disk,Real-time computing,Disk mirroring,Disk array controller,Operating system,Disk sector,Disk controller,Embedded system | Conference | 1-880446-03-0 |
Citations | PageRank | References |
50 | 2.87 | 17 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Christopher R. Lumb | 1 | 328 | 21.27 |
| Jiri Schindler | 2 | 411 | 26.82 |
| Gregory R. Ganger | 3 | 4560 | 383.16 |