Linked by Thom Holwerda on Mon 15th Nov 2010 23:37 UTC, submitted by comay
Oracle and SUN Today Oracle released its latest version of Solaris technology, the Oracle Solaris 11 Express 2010.11 release. It includes a large number of new features not found in either Oracle Solaris 10 or previous OpenSolaris releases including ZFS encryption and deduplication, network-based packaging and provisioning systems, network virtualization, optimized I/O for NUMA platforms and optimized platform support including support for Intel's latest Nehalem and SPARC T3. In addition, Oracle Solaris 10 support is available from within a container/zone so migration of existing systems is greatly simplified. The release is available under a variety of licenses including a supported commercial license on a wide variety of x86 and SPARC platforms.
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RE[4]: ZFS
by kaiwai on Tue 16th Nov 2010 17:30 UTC in reply to "RE[3]: ZFS"
kaiwai
Member since:
2005-07-06

The problem was the 32bit cpu. ZFS is 128 bit, and does not like 32 bit cpus, performance will suck. I used 32bit Pentium4 and 1GB RAM for a year, and I got 20-30MB/sec with a ZFS raid with 4 discs. This sucks indeed.

If you use 64 bit cpus, then performance will be normal.


But on low powered 64bit processors such as the MacBook Air 1.4Ghz the experience isn't exactly going to be all that pleasant to say the least. The amount of memory is a big killer - give it 4GB of memory and it flies but I say 2GB minimum but even then it isn't all too pleasant. It is a great file system designed for a large system with a tonne of memory but for something that is low powered requiring something light weight it is probably not the ideal file system to use.

The reason ZFS gets slow, is because ZFS does lots of checksumming and computations with respect to data integrity. ZFS wants to guarantee that your data is not subject to bit rot or silent corruption. Other filesystems or solutions, dont do that. Why do you think they are much faster than ZFS? Because they dont do the expensive calculations with respect to data safety!


People must have some really bad luck because of all the things that have pulled down my computer I've never experienced file system corruption - 9/10 if something goes haywire it is because of my own doing rather than an act of the computer gods trying to smite me with a kernel panic and file system corruption.

In the 10 years I've owned Mac's (from an eMac to the current iMac and MacBook Pro) I haven't experienced a single case of file system corruption *touch wood*

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