roc@sequent.UUCP (Ron Christian) (04/01/89)
Is 4.3 BSD dump any faster than 4.2 BSD dump in driving the tape drive?
Are there faster possibilities that retain the functionality of dump?
("volcopy", "finc" and "frec" are RIGHT out.)
Ronchris@mimsy.UUCP (Chris Torek) (04/01/89)
(Don Speck should really answer this one...) In article <13622@sequent.UUCP> roc@sequent.UUCP (Ron Christian) writes: >Is 4.3 BSD dump any faster than 4.2 BSD dump in driving the tape drive? Yes. >Are there faster possibilities that retain the functionality of dump? Yes. Most of them involve kernel hacks. One that does not: If the disks are sufficiently full, and you have sufficient real memory (say 32+ MB), you could make a version of dump that reads entire cylinder groups into memory. If your transfer rate is substantially higher than your seek time%, this will help for all but the largest files on most Unix machines. (If the disks are not very full, this will slow things down instead.) ----- % well, you know what I mean :-) -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163) Domain: chris@mimsy.umd.edu Path: uunet!mimsy!chris