On Sat, 13 Sep 2014 15:43:00 -0400
Richard Hipp <d...@sqlite.org> wrote:
> There were often restrictions on the permitted values for block
> sizes. And you couldn't ask the operating system to tell you whether
> a file was text or binary or sequential or random-access or what its
> block-size was; you just had to know.
That brings to mind Faulkner's observation:
"The past is never dead. It's not even past."
VSAM has the properties you describe, and is the successor to ISAM,
which was the state of art when Unix was being invented. VSAM is still
alive and kicking, see VSAM Demystified:
http://www.redbooks.ibm.com/abstracts/sg246105.html?Open
Sample paragraph:
"VSAM is used to organize records into four types of data sets:
Key-sequenced (KSDS), entry-sequenced (ESDS), linear (LDS), and
relative record (RRDS and VRRDS). The primary difference between the
types of VSAM data sets is the way that their records are stored and
accessed."
Whatever complaints one might have with Posix, ten minutes with that
document will reveal the blessings of mmap and fsync!
--jkl
_______________________________________________
sqlite-users mailing list
sqlite-users@sqlite.org
http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
