f2fs | This file was moved to Documentation/admin-guide/README | REST library

by jaegeuk C Version: v6.3-rc1 License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | f2fs Summary

f2fs is a C library typically used in Web Services, REST, Ruby On Rails applications. f2fs has no bugs, it has no vulnerabilities and it has low support. However f2fs has a Non-SPDX License. You can download it from GitHub.

This file was moved to Documentation/admin-guide/README.rst. Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use `make htmldocs` or `make pdfdocs`. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.

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Quality

Security

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Support

f2fs has a low active ecosystem.

It has 19 star(s) with 4 fork(s). There are 5 watchers for this library.

It had no major release in the last 6 months.

f2fs has no issues reported. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of f2fs is v6.3-rc1

Quality

f2fs has no bugs reported.

Security

f2fs has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

f2fs has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

f2fs releases are not available. You will need to build from source code and install.

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f2fs Key Features

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f2fs Examples and Code Snippets

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Community Discussions

Trending Discussions on f2fs

Why does adb remount fail?

VirtualBox Ubuntu 16.04 LTS and exfat-fuse failing

formatted SSD sequential write throughput with O_SYNC flag

QUESTION

Why does adb remount fail?

Asked 2021-Jan-12 at 21:33

When I enter adb remount the terminal responds with

Skip mounting partition: /product

Skip mounting partition: /product_services

W DM_DEV_STATUS failed for scratch: No such device or address E

[liblp]No device named scratch

[liblp]Partition scratch will resize from 0 bytes to 814587904 bytes

[liblp]Updated logical partition table at slot 0 on device /dev/block/by-name/super

[libfs_mgr]Created logical partition scratch on device /dev/block/dm-3

[libfs_mgr]__mount(source=/dev/block/dm-3,target=/mnt/scratch,type=f2fs)=0:

Success

Skip mounting partition: /product

Skip mounting partition: /product_services

[libfs_mgr]__mount(source=overlay,target=/vendor,type=overlay,upperdir=/mnt/scratch/overlay/vendor/upper)=0 Skip mounting partition: /product Skip mounting partition: /product_services

/system/bin/remount exited with status 7 remount

failed

Why is adb remount failing here?

...

ANSWER

Answered 2021-Jan-11 at 10:09

Your Tv emulator is user build which means adb root is disabled in that build, while your other emulator is userdebug build means it has adb root enabled, here is more details about builds so in order to enable root in your tv emulator you need to root it. Here is some info about rooting emulator. If you can root your tv emulator then it you can run adb shell & su commands to remount it in read/write mode.

Source https://stackoverflow.com/questions/65627342

QUESTION

VirtualBox Ubuntu 16.04 LTS and exfat-fuse failing

Asked 2019-Jan-19 at 21:21

Ubuntu is apparently failing to correctly setup exFAT support after installing the exfat-fuse and exfat-utils dependencies.

exFAT is nowhere listed on filesystems sources. Any idea on what is going on? Am I missing something?

...

ANSWER

Answered 2017-May-11 at 11:33

Issue solved. Forgot to specify the volume offset (mount -o offset=byteoffset) in the image while mounting, which explains why the filesystem was not being found.

Source https://stackoverflow.com/questions/43849858

QUESTION

formatted SSD sequential write throughput with O_SYNC flag

Asked 2017-Aug-29 at 07:03

I have got a Western Digital 500 GB internal SSD (WDS500G1B0A). Its specification states 525 mbps of sequential write speeds. I formatted this SSD using f2fs.

Then I performed sequential writes of size 4k on the file system using O_SYNC flag (to ensure that the writes get committed to disk when the write returns). My test program is single threaded.

I understand that the throughput of this is going to be a combination of IOPs and latency ratings of the underlying SSD. What throughput should I expect with such execution? I got only around 8k IOPS.

I can also share my test program in case I am missing something basic.

Am I also missing something else with formatting SSD etc.?

When I run the same program without O_SYNC flag on the same formatted SSD, I get 10 times better results (around 80k IOPS). What additional tuning or testing I can do to get a better handle on what is happening?

...

ANSWER

Answered 2017-Aug-29 at 07:03

Let me first admit that I was baffled by the 80 k IOPS without O_SYNC flag as they happened to coincide with the SSD IOPS (525 MB / 4k blocksize ~ 100 k IOPS). I should have stuck to the throughput specification of 525 MB for my analysis. What I observed is that the SSD throughput indeed gets close to this specification even with O_SYNC flag albeit with very large block size (around 16 MB) which is understandable.

Since without O_SYNC flag, linux must be committing the writes in in-memory kernel buffers we cannot really use it for underlying SSD IO performance analysis. It must be dependent on other factors of the hardware like memory, CPU etc. E.g. on a more powerful server I could even see 2000 MBps which is unrealistic at the SSD level.

SSD can perform better than HDD even without O_SYNC flag while the writes are getting flushed to disk periodically since that would be a reasonable model for the IO application on top. I can share my numbers with this analysis in case anyone is interested.

Sorry for going on a different tangent with my original question. However it was some good learning anyway. Hence I thought of posting my answer here.

Source https://stackoverflow.com/questions/45768055

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Vulnerabilities

No vulnerabilities reported

Install f2fs

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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