SOLVED: squid problem (/dev/null)

[Christos Ricudis]

Hello Papadogiannakis!

  On 16 Jun 01, Papadogiannakis Vagelis wrote to Christos Ricudis with subject
"Re: SOLVED: squid problem (/dev/null)":

 PV> mpaaa, psila grammata... Mono apo to xrono tou fsck 8a mas
 PV> glitonei to ext3 kai elaxista apo data corruption.

Me toys shmerinous diskous, to fsck time einai aparadekta ypshlo - kai einai
shmantiko ayto, giati meiwnei akoma perissotero to availability toy systhmatos.
Ase poy oso trexei to fsck, yparxei ena sobaro window sto opoio endexomeno
power down mporei na prokalesei akoma megalyterh zhmia. 

Oson afora to data corruption. 

To 8ema DEN einai to data corruption, dedomena poy den ta egrapses ta'xeis
xasei etsi ki alliws. To problhma einai to filesystem metadata corruption. H
basikh diafora twn journalled filesystems einai oti mporoun na kanoyn rollback
hmitelh metadata updates, kai na to kanoyn grhgora kai me asfaleia. 

 PV> PS: 8imasai pou to sizitousama mia fora sto #linux, kai mou
 PV> eleges gia reiserfs, kai sou elega oti ext3 to vlepo giati 
 PV> to ipostirizoun megales dianomes? (px redhat)

No matter poios paparas yposthrizei kati, prepei na einai kai kalo gia na
doulepsei. Kai h suse yposthrizei to reiserfs kai eidame ti paparia bghke. 

Perissoterh prosoxh apo ola dinw sto ext3, gia ena kai monadiko logo : Einai
ena MIKRO sxetika addition se ena hdh yparxon kai sklhra dokiasmeno LINUX
filesystem. Meiwnetai dramatika to peri8wrio gia bugs, asymbatibilities, ktl,
se sxesh me to jfs h to xfs poy apaitoyn ena shmantiko reimplementation gia na
'kollhsoyn' sto linux. 

 PV> Ap' oti vlepo, to eides kai monos sou :) Alla epeidi genikotera
 PV> o logos sou varainei, eilikrina 8a i8ela na ksero ti enoeis 
 PV> legontas :

 >> [1] No Reiserfs here

 PV> Se apogoitefse gia kapoio logo?

To implementation toy einai incomplete, yparxoyn akoma race conditions kai
pi8anotata bugs, den yposthrizei opws 8a eprepe kapoia inode operations.
Dokimase na baleis AFS over reiserfs, na deis poso wraia mporei ena userlevel
application na sou katastrepsei to filesystem. 

Ola ayta, giati? Epeidh o Hans Reiser exei apo pisw toy mia etairia, ths opoies
oi metoxes PREPEI na aneboun gia na bgalei kana fragko o an8rwpos. Ara, EPREPE
na mpei grhgora sto mainstream kernel (8ymamai akoma ton kabga gi ayto to
8ema), EPREPE na fainetai kalo sta benchmarks, ktl ktl ktl. E, katelhkse na mh
moy empneei kai tosh empistosynh. 

--
Christos Ricudis

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