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Topic: VxFS

	VxFS: Tutte le informazioni su VxFS su Encyclopedia.it (Site not responding. Last check: 2007-10-13)
		VxFS: Tutte le informazioni su VxFS su Encyclopedia.it
		VxFS è un file system journaling commerciale sviluppato da Veritas Software disponibile per i più comuni sistemi Unix come, ad es., HP-UX, Solaris e SCO UnixWare.
		Le versioni usate in HP-UX, Solaris e SCO UnixWare usano struttture leggermente differenti: non vi è interoperabilità tra i file system VxFS di questi sistemi.
	www.encyclopedia.it /v/vx/vxfs.html (122 words)

	[ANNOUNCE] VxFS 0.1 (Site not responding. Last check: 2007-10-13)
		To: linux-fsdevel@vger.kernel.org Subject: [ANNOUNCE] VxFS 0.1 Date: Sat, 14 Apr 2001 19:26:01 +0200 I'm proude to annouce the first release of a free readonly VxFS driver for Linux.
		Special thanks go to Al Viro for the ext2 directories in pagecache code which inspired the VxFS directory code heavily.
		The Veritas Filesystem has different porting lines to different operationg systems and cpu architectures - while this release has only been tested with VxFS v4 filesystems created by UnixWare 7.x it is believed to work with other ports of the same version, as long as the filesystem is stored in native byte order.
	lwn.net /2001/0419/a/vxfs.php3 (226 words)

	[No title] (Site not responding. Last check: 2007-10-13)
		This is because VxFS for performance reasons tries to perform a direct I/O. In order to achieve this, the user stack has to be grown to the amount of data requested for read/write.
		The umount process grabs the VxFS update sleep lock (used to serialize VxFS syncs/mounts/ umounts), calls spec_close to close the device we are unmounting, and eventually gets to a LVM close routine which is sleeping waiting to acquire the LVM VG lock.
		The VxFS fsck command never detected this, and the mount command was failing in the kernel due to a filesystem validation error.
	hpwww.epfl.ch /HPUX/security/PHKL_16750 (20521 words)

	SUMMARY: After your opinion: VxFs v ufs+logging & Disk-suite
		Always VxFS for oracle file systems because performance is so much better, and we evaluate the needs for VxFS on systems that may have high IO needs.
		VxFS is by far, a better file system in terms of proven reliability and performance.
		VxFS is too expensive, and if you spread stuff over several drives and get a media problem, it's tough to find out what drive is actually failing.
	sunportal.sunmanagers.org /pipermail/summaries/2002-August/002482.html (1910 words)

	vxfsconvert(1M)
		The space is acquired from free space within the file system or from the space available immediately after the end of the file system.
		Specify the amount of available disk space at the end of the file system in kilobytes With this option all disk space required for the conversion process is taken from the end of the file system; the existing free space within the file system remains intact.
		The converted VxFS file system uses the Version 4 disk layout, which is only recognized by JFS 3.3 and later versions.
	docs.hp.com /en/B3921-90010/vxfsconvert.1M.html (1267 words)

	Performance and Tuning
		The unit of allocation in VxFS is a block.
		If the VxFS file system is being used with the VERITAS Volume Manager, the file system queries the Volume Manager to find out the geometry of the underlying volume and automatically sets the I/O parameters.
		VxFS determines, based on the first write to a new file, the size of the first extent to be allocated to the file.
	uw713doc.sco.com /en/ODM_FSadmin/fssag-8.html (3858 words)

	Scalability and Performance in Modern Filesystems
		Since VxFS extent descriptors only include the starting block within the file system and the extent length (no offset within the file), there is no easy way to skip holes.
		VxFS has a 96-byte "immediate area" in each inode that can be used to store symbolic links and small directories.
		Since VxFS lacks the tight integration with the host operating system that XFS has, it is difficult for VxFS to provide these optimizations.
	oss.sgi.com /projects/xfs/papers/xfs_white/xfs_white_paper.html (10221 words)

	Improving Availability in VERITAS Environments
		A VxFS snapshot is mounted by associating storage with a mounted VxFS filesystem.
		The main advantage of a VxFS snapshot is that it uses less disk space than a Volume Manager snapshot, only requiring enough storage to accommodate the blocks that change during the time the snapshot is mounted.
		VxFS checkpoints are a sophisticated way of providing the Volume Manager snapshot capability of reverting a filesystem back to a specific point in time nearly instantaneously.
	www.vxideas.org /lisa2000_veritas.html (4079 words)

	HP-UX: fsck_vxfs (Site not responding. Last check: 2007-10-13)
		If special is not specified, fsck prompts you with each file system listed in /etc/fstab to determine which file system to check, unless you specify -y or -Y, to automatically answer yes to the prompts.
		Additionally, if the file system requires a full file system check after the log replay, or if the nolog suboption causes the log replay to be skipped and the file system is not clean, then a full file system check is performed.
		Because VxFS maintains an intent log, a complete check is generally not required; the default is to replay the intent log only.
	www.nixdoc.net /man-pages/HP-UX/man1m/fsck_vxfs.1m.html (1523 words)

	Solid Data Systems: Customer Success Stories -- Critical Path - Veritas
		VxFS is a journaling file system: it records each file write before it is committed to disk.
		In VxFS, journals are called intent logs because there is an "intent" to write the data.
		However, VxFS includes an important feature - QuickLog™ - which allows the intent logs to be moved to a separate device, thus eliminating contention for the same I/O connection.
	www.soliddata.com /company/critical_path_veritas.html (802 words)

	Quotas
		This is a BSD quotas implementation requirement, and is also applicable to VxFS quotas.
		VxFS also maintains an internal quotas file for its internal use.
		When quotas are turned off, the contents of the internal quotas file are flushed into the external quotas file so that all data is in sync between the two files.
	docsrv.sco.com /ODM_FSadmin/fssag-10.html (995 words)

	Using VERITAS File System on a DLPAR-enabled pSeries server
		VxFS reconfigures itself during a DR change and does not require any input from the system administrator or developer.
		During a DR change, VxFS resizes its caches to match the configuration it would have been, after a normal boot, with the new CPU and memory sizes.
		Our aim was to observe any effect on a VxFS file system that was being stressed by the nmon tool by issuing many disk reads and writes to the file system.
	www-128.ibm.com /developerworks/eserver/articles/DLPAR_Veritas_2.html (3674 words)

	Quick Reference: AIX Journaled File Systems and Veritas File System
		VxFS can optimize I/O and is designed to work with standard volume managers.
		VxFS requires a single log per file system, although JFS and JFS2 both give the user the option of having one log shared across file systems or giving each file system its own log.
		VxFS and JFS allow the user to disable the need to log metadata and to use the log through the mount option.
	www-03.ibm.com /servers/aix/products/aixos/whitepapers/jfs_vfs.html (919 words)

	mount_vxfs(1M)
		VxFS maintains quota information in a private area of the file system.
		If the file system is mounted with quotas enabled, and the file system was previously mounted with quotas disabled and was modified, then the quota information is rebuilt.
		When this option is chosen, VxFS does not zero out new extents allocated as files are sequentially written.
	docs.hp.com /en/B2355-90129/mount_vxfs.1M.html (976 words)

	newfs vxfs solaris
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	hometown.aol.com /ephedra098/newfs-vxfs-solaris.html (265 words)

	Fast filesystem recovery for vxfs (Site not responding. Last check: 2007-10-13)
		The vxfs filesystem provides recovery only seconds after a system failure by using a tracking feature called ``intent logging''.
		Upon recovery from a system failure, the vxfs fsck command scans the intent log, nullifying or completing filesystem operations that were active when the system failed.
		Except for the fact that vxfs filesystem recovery is completed in a few seconds, the intent log recovery feature is not readily apparent to either the user or the system administrator.
	www.pyrenet.fr:8458 /en/FS_admin/_Fast_File_System_Recovery_for_v.html (214 words)

	File System Operations
		When mounting a VxFS file system, options that affect the performance of the file system can be specified.
		This operation invokes the VxFS snapshot approach, which is generally preferable to the Volume Manager approach.
		With VxFS, a snapshot image of a mounted file system is created by "snapshot" mounting another file system which then becomes an exact copy of the first file system.
	docsrv.sco.com /ODM_VMug/ug-8.html (7798 words)

	VMTN Discussion Forums: Can ESX mount and write a vxfs ... (Site not responding. Last check: 2007-10-13)
		The way we would like to do this is to create a shared filesystem on the HP machine (i.e., vxfs) from SAN attached disk (Clariion) that could be mounted by the ESX server, have the.dsks exported to then unmounted and mounted on the HP machine.
		One solution I can see is sharing the HP's vxfs filesystem using a NFS share, and pushing from the ESX your.dsk exports to this drive.
		I see that Veritas now have a RedHat version of their San Foundation Suite which includes the VxFS, but I have no idea how well (if at all) this works in the modded ESX kernel.
	www.vmware.com /community/thread.jspa;jsessionid=0D950BB45DE2D403689A791AD1550E24?messageID=44683꺋 (383 words)

	VxFS Incorrect File Permissions Vulnerability - Advisories - Secunia
		Sun has reported a vulnerability in VERITAS File System (VxFS), which can be exploited by malicious, local users to gain unauthorised access to various files on a vulnerable system.
		VxFS versions 3.3.3 to 3.5 for Solaris has been reported vulnerable.
		VxFS 3.5 (for Solaris 2.6) is not supported, and Sun therefore advises customers to contact VERITAS and reference VERITAS incident #113367.
	secunia.com /advisories/9135?show_result=1 (224 words)

	[ale] UFS/SDS v VxFS/VxVM (was: ext3 v reiserfs)
		The coupling of VxFS and VxVM gives you some advantages and power you don't necessarily get when you combine UFS and SDS (Sun's Volume Manager).
		Performance-wise I have yet to run into a situation where UFS was slower than VxFS.
		The one clear cut advantage VxFS has (that I've made use of) is it's ability to shrink volumes.
	www.ale.org /pipermail/ale/20030915/000447.html (425 words)

	Getting to know the Solaris filesystem, Part 1 - SunWorld - May 1999
		Direct I/O was initially implemented in the UFS filesystem, and VxFS has subsequently been enhanced to provide a wide range of direct I/O facilities.
		The VxFS filesystem implements direct I/O automatically for I/O sizes larger than 256 KB by default (this size can be tuned), and also provides a mechanism to create a raw device which represents direct access to the file.
		VxFS and QFS must be used in direct mode to avoid causing a memory shortage
	www.solarisinternals.com /si/reading/sunworldonline/swol-05-1999/swol-05-filesystem.html (5733 words)

	ncheck_vxfs(1M) (Site not responding. Last check: 2007-10-13)
		ncheck [-F vxfs] [generic options] [-i ilist] [-a] [-s] [-o specific_options] special...
		If -F vxfs is not specified heuristics similiar to those used by fstyp(1M) are used to determine the file system type.
		This command executes faster if it is not required to autodetect file system types.
	216.250.128.246 /cgi-bin/man?mansearchword=ncheck_vxfs&mansection=1M&lang=en (507 words)

	BYTE.com
		Once extended, the operating system--all the way down to the kernel--knows how to talk directly to the file system, and layout-sensitive storage-management tools (like mount and the fsck file-system check/repair tool) are infused with knowledge of the new layout.
		Normally, when you combine multiple subdis ks to create a file system, data is written to those subdisks in the order in which they were joined.
		The commands that manage vxfs volumes are a superset of the standard Unix storage-management commands.
	www.byte.com /art/9502/sec13/art2.htm (1870 words)

	Press Room 1995 (Site not responding. Last check: 2007-10-13)
		VxFS works with FTX to provide on-line administration features that increase FTX availability, by providing on-line backup, on-line disk defragmentation, and on-line resizing of file systems.
		VxFS provides journalling, which is based on proven database methodology that allows for the rollback of transactions not yet completed.
		Therefore, if the system crashes, both the changed file data and meta-data are written to disk, and the system can replay the log file on start-up to restore the file system to a stable condition quickly.
	www.veritas.com /us/aboutus/pressroom/1995/95-06-14-0.html (513 words)

	hpux-admin Archive (1998) - SUMMARY: Tuning VxFS
		What is probably confusing you is that you do a bdf on your newly created vxfs file system and the bdf seems to show that not all the space is available.
		Due to the fact that vxfs creates inodes dynamically, as they are needed, the bdf and df commands make a "guess" as to how much space will be needed for those inodes, and subtracts that from the space available.
		The only consideration is the backwards move in that before it can be completed you have to remove the large files [fsadm_hfs (1M) -I don't have a fsadm_vxfs but I'm sure the same is true].
	aa11.cjb.net /hpux_admin/1998/0065.html (690 words)

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