× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.


  1.  Home
  2. MIDRANGE-L
  3. September 2017

Re: Database I/O Modernization

On Fri, Sep 15, 2017 at 3:18 PM, Charles Wilt <charles.wilt@xxxxxxxxx>
wrote:

​Not even close. Yes at some point a block of data is read, and part of
that data is extracted as a "record" or more likely a set of records.


That's RLA! Whether the read operation returns a pointer to one record or
to a block of records is based on whether "blocking" was selected when the
file was opened.


So the disk I/O it the bottom is basically the same, but that doesn't mean
SQL is ​using RLA.


You and I evidently have a different definition of RLA. To me, open, close,
read, write, update, delete, position to, lock, unlock are RLA operations.
And yes, that is what the SQE is using under the covers.

As an Amazon Associate we earn from qualifying purchases.

This thread ...
Follow-Ups:
Replies:
Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.