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thumb drive

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Bob Mottram 2018-10-16 18:14:49 +01:00
parent 1a7f3a96f9
commit 6ad20d7ea2
4 changed files with 14 additions and 2 deletions
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5
docs/jargon-org.txt
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@ -19,7 +19,7 @@ Free Documentation License".
* Generated
This file last generated Tuesday, 16 October 2018 05:07PM UTC
This file last generated Tuesday, 16 October 2018 05:14PM UTC
* Glossary
** (
@ -7938,6 +7938,9 @@ n. Syn. Vulcan nerve pinch.
*** thumb
n. The slider on a window-system scrollbar. So called because moving it allows you to browse through the contents of a text window in a way analogous to thumbing through a book.
*** thumb drive
Flash storage drive about the size of your thumb and typically interfaced via USB. Superceded the floppy disk or CD-ROM as a way of sneakernetting data around.
*** thundering herd problem
Scheduler thrashing. This can happen under Unix when you have a number of processes that are waiting on a single event. When that event (a connection to the web server, say) happens, every process which could possibly handle the event is awakened. In the end, only one of those processes will actually be able to do the work, but, in the meantime, all the others wake up and contend for CPU time before being put back to sleep. Thus the system thrashes briefly while a herd of processes thunders through. If this starts to happen many times per second, the performance impact can be significant.

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docs/jargon.html
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@ -18,7 +18,7 @@ Free Documentation License".
</p>
<H2>Generated</H2>
<p>
This file last generated Tuesday, 16 October 2018 05:07PM UTC
This file last generated Tuesday, 16 October 2018 05:14PM UTC
</p>
<H2>Glossary</H2>
@ -9306,6 +9306,10 @@ This file last generated Tuesday, 16 October 2018 05:07PM UTC
<p>
n. The slider on a window-system scrollbar. So called because moving it allows you to browse through the contents of a text window in a way analogous to thumbing through a book.
</p>
<H4>thumb drive</H4>
<p>
Flash storage drive about the size of your thumb and typically interfaced via USB. Superceded the floppy disk or CD-ROM as a way of sneakernetting data around.
</p>
<H4>thundering herd problem</H4>
<p>
Scheduler thrashing. This can happen under Unix when you have a number of processes that are waiting on a single event. When that event (a connection to the web server, say) happens, every process which could possibly handle the event is awakened. In the end, only one of those processes will actually be able to do the work, but, in the meantime, all the others wake up and contend for CPU time before being put back to sleep. Thus the system thrashes briefly while a herd of processes thunders through. If this starts to happen many times per second, the performance impact can be significant.

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entries/thumb_drive.txt Normal file
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@ -0,0 +1,5 @@
thumb drive
Flash storage drive about the size of your thumb and typically interfaced via
USB. Superceded the floppy disk or CD-ROM as a way of sneakernetting data
around.