Clustering

[Christos Ricudis]

Hello Linux-greek-users!

  On 24 Jan 00, Linux-greek-users wrote to All with subject "Re: Clustering":

 L> To mosix (  den to exw xrisimopoisei ) fenetai na einai i lish pu
 L> psaxneis. Exw akusei poly kala logia gia to paketo.

 L> An to steiseis pes mas kai emas pws simperiferetai..

De sto synistw. 

To MOSIX kanei process load balancing kai process migration. Einai kalo gia 
na kaneis distribute long-life, CPU-intensive jobs, efoson exeis kalo reference
locality sta dedomena sou. Den kanei gia short-lived processes, opws to apache
- ekei kaneis alliws to load balancing. Oso gia thn oracle, kalytera gia sena
kai gia ta dedomena sou na mh dokimasei kapoia stigmh to MOSIX na 
thn kanei migrate sto diplano host :>. Klassikh efarmogh gia to MOSIX einai 
ena lab gemato apoxaynwmenoys engineers poy trexoyn ateleiwta batches 
apo ateleiwta nested loops se ateleiwtous fortran kwdikes. :>. 

To process migration dhmiourgei polla problhmata se ena systhma. Kat'arxas
den einai dynaton na metafereis olo to state enos process se ena allo systhma
(ti ginetai logou xarh me ta network connections?). Synh8ws epishs prokalei
fluctuations (to systhma stelnei ena process apo to mhxanhma A sto B poy exei
mikrotero load, to load sto A katebainei kai to process ksanaphgainei ekei, ktl
ktl ktl). Epishs exei ena poly shmantiko overhead. Genika oi researchers
akoma tsakwnontai gia to katw apo poies syn8hkes apobainei kerdoforo to na 
kaneis migrate ena process. 

Oson afora ton Apache, protimaei na kanei diko toy load balancing, kai h 
kalyterh lysh gia na to kaneis einai na xrhsimopoihseis NAT h round robin DNS.

--
Christos Ricudis
Prof:    So the American government went to IBM to come up with a data
         encryption standard and they came up with ...
Student: EBCDIC!
--
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