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The individual owning this blog works for Oracle in Germany. The opinions expressed here are his own, are not necessarily reviewed in advance by anyone but the individual author, and neither Oracle nor any other party necessarily agrees with them.
DTrace ausgezeichnet
Thursday, September 14. 2006
Jürgen weisst in seinem Weblog auf einen Artikel bei pro-Linux hin: "DTrace mit Innovationspreis ausgezeichnet
" hin. Am interessantesten ist allerdings folgender Abschnitt:
PS: Besser als einer Kommentatoren des letzteren Kommentars kann man übrigens den Vergleich nicht zusammenfassen ... "A simple way of putting this is that the linux community have made some thing cool - and the Solaris team made some thing really useful!"
" hin. Am interessantesten ist allerdings folgender Abschnitt:
Da DTrace unter der CDDL steht, ist eine Portierung auf den Linux-Kernel in naher Zukunft ausgeschlossen. Das Linux-Analog zu DTrace ist SystemTap. Es verwendet kprobes, das seit 2004 im Kernel enthalten ist, zur Messung. SystemTap selbst ist zwar eine Userspace-Anwendung, doch es compiliert die vom Benutzer erstellten Skripte in Kernel-Module, die zur Messung in den laufenden Kernel geladen werden. Fehler in den Skripten können das ganze System zum Absturz bringen, weshalb SystemTap auf Produktivsystemen kaum einsetzbar ist.Wer mehr über den Vergleich von SystemTap und DTrace wissen möchte, sollte sich übrigens Comments to this Systemtap vs Dtrace comparison durchlesen.
PS: Besser als einer Kommentatoren des letzteren Kommentars kann man übrigens den Vergleich nicht zusammenfassen ... "A simple way of putting this is that the linux community have made some thing cool - and the Solaris team made some thing really useful!"
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Da finde ich folgenden Kommentar auch passend:
"With many customers that had successes, we even took this to the next level and would bring their Linux application over to Solaris (some required porting, but Java apps just worked) and do the analysis. In each and every case, we were able to find significant performance gains.
Well, just as it struck me, it appears to have struck many of the customers that taking that optimized app back to Linux was just plain odd. Why, if Solaris runs on the same hardware as RHEL3 (for example), do we use Solaris to improve our app and then return it back to its original OS? Why not just run the application on Solaris where we can use DTrace in production (and get all of the other great Solaris 10 features as well)?"
http://www.sun.com/bigadmin/content/dtrace/blogs/jarod/
"With many customers that had successes, we even took this to the next level and would bring their Linux application over to Solaris (some required porting, but Java apps just worked) and do the analysis. In each and every case, we were able to find significant performance gains.
Well, just as it struck me, it appears to have struck many of the customers that taking that optimized app back to Linux was just plain odd. Why, if Solaris runs on the same hardware as RHEL3 (for example), do we use Solaris to improve our app and then return it back to its original OS? Why not just run the application on Solaris where we can use DTrace in production (and get all of the other great Solaris 10 features as well)?"
http://www.sun.com/bigadmin/content/dtrace/blogs/jarod/
+1
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