[#CORE-4443] Use fast file grow on those Linux systems which supports it

Firebird Core

Use fast file grow on those Linux systems which supports it

Created: 29/May/14 07:28 AM Updated: 23/Sep/15 12:19 PM

Component/s:

Engine

Affects Version/s:

None

Fix Version/s:

2.5.3, 3.0 Beta 1

Issue Links:

Depend

This issue block progress on:

~~CORE-4445~~ Extend main database file faster when physical backup state changed from stalled to merge

Relate

This issue is related to:

~~CORE-1479~~ Posix implementation

~~CORE-1469~~ Improve performance of database file growth after CORE-1228 was fixed

QA Status:

Cannot be tested

All

Comments

Change History

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Vlad Khorsun made changes - 29/May/14 07:29 AM

Field	Original Value	New Value
Link		This issue is related to ~~CORE-1469~~ [ ~~CORE-1469~~ ]

Vlad Khorsun made changes - 29/May/14 07:29 AM

Link

This issue is related to ~~CORE-1479~~ [ ~~CORE-1479~~ ]

Vlad Khorsun made changes - 29/May/14 07:32 AM

Assignee

Vlad Khorsun [ hvlad ]

Vlad Khorsun made changes - 29/May/14 07:36 AM

Link

This issue block progress on ~~CORE-4445~~ [ ~~CORE-4445~~ ]

Vlad Khorsun made changes - 29/May/14 07:44 AM

Fix Version/s		2.5.3 [ 10461 ]
Fix Version/s		3.0 Beta 1 [ 10332 ]

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Sean Leyne added a comment - 11/Jun/14 02:51 PM

Vlad,

Some details for this case are really appropriate.

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Vlad Khorsun added a comment - 12/Jun/14 07:18 AM

In short: added ability to use fallocate()

No so short:
Firebird used pre-allocation of disk space when it decides to extend database file.
It could be done in a few ways
a) write zero's at the end of file page by page (very slow)
b) write zero's at the end of file using relatively big chunk (faster)
c) use OS\FS services to reserve space for a given file (fastest)

On Windows we already using (c) : SetEndOfFile does what we need. But on Posix there was no
such system call at that time, so (b) was used.

Now fallocate() is supported by most Linux cores and file systems (yes, it requres explicit support
by file system). Therefore we implemented ability to use fallocate() and handle case when call is not
supported by file system (in this case (b) will be used as before).

Vlad Khorsun made changes - 12/Jun/14 07:19 AM

Status	Open [ 1 ]	Resolved [ 5 ]
Resolution		Fixed [ 1 ]

Pavel Zotov made changes - 03/Jun/15 05:33 PM

Status	Resolved [ 5 ]	Resolved [ 5 ]
QA Status		Cannot be tested

Pavel Cisar made changes - 23/Sep/15 12:19 PM

Status

Resolved [ 5 ]

Closed [ 6 ]