ocf | Open CAS Framework is high performance block | Caching library

by Open-CAS C Version: v22.6 License: BSD-3-Clause

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | ocf Summary

ocf is a C library typically used in Server, Caching applications. ocf has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Open CAS Framework

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Quality

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Support

ocf has a low active ecosystem.

It has 150 star(s) with 75 fork(s). There are 22 watchers for this library.

It had no major release in the last 12 months.

There are 13 open issues and 79 have been closed. On average issues are closed in 111 days. There are 8 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of ocf is v22.6

Quality

ocf has no bugs reported.

Security

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

License

ocf is licensed under the BSD-3-Clause License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

ocf releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

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ocf Key Features

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ocf Examples and Code Snippets

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Community Discussions

Trending Discussions on ocf

drbd & Corosync - My drbd works, it shows me that it is upToDate, but it is not

R: Performing Gradient Descent Directly on Functions Instead of Data Points from the Function

Faster way to assign individual value to a xarray dataset

xarray assigning individual values to one variable/dataArray ends up assigning to all variables/dataArray

Listener oracle in pacemaker cluster

What am I missing on how to change the df.to_csv outfile name for looping through a folder?

Pacemaker not able to start slave node on postgres-11

Docker version is different from what was intended from the command

Having trouble stopping U-Boot autoboot

Ansible - Set-fact with loop variable?

QUESTION

drbd & Corosync - My drbd works, it shows me that it is upToDate, but it is not

Asked 2022-Feb-24 at 20:04

I have a high availability cluster with two nodes, with a resource for drbd, a virtual IP and the mariaDB files shared on the drbd partition.

Everything seems to work OK, but drbd is not syncing the latest files I have created, even though drbd status tells me they are UpToDate.

...

ANSWER

Answered 2022-Feb-23 at 09:15

I have found a Split-Brain that did not appear in the status of pcs.

Source https://stackoverflow.com/questions/71225748

QUESTION

R: Performing Gradient Descent Directly on Functions Instead of Data Points from the Function

Asked 2022-Jan-15 at 11:40

I am using the R programming language. Using this link over here https://www.ocf.berkeley.edu/~janastas/stochastic-gradient-descent-in-r.html , I found a function that allows you to perform Gradient Descent on data points from a function:

...

ANSWER

Answered 2022-Jan-15 at 11:40

We assume that gradientR solves the problem you have and the question is getting it to work with your input. There are several problems here:

One cannot pass a function to the gradientR. y and X must be vectors or matrices.
Many optimization problems have scaling issues if you give them numbers that are very different. This one is no different. Use x/1000 instead of x.
Just to be clear on what the underlying problem being solved is, it is to find a coefficient vector b such that the sum of the squares of the residual vector y - cbind(1, x) %% b is minimized where y and x are known. Several commenters interpreted the problem differently but if their interpretation is what you want then gradientR is not applicable and , anyways, the problem of maximizing or minimizing x^3-2x-5 has no finite solutions.
If you want to pass func instead of y then just write a simple wrapper, grad2, as shown below.

To fix the scaling issue use it with x/1000 and y as shown.

Source https://stackoverflow.com/questions/70703787

QUESTION

Faster way to assign individual value to a xarray dataset

Asked 2021-Dec-17 at 01:14

I realize that assigning individual values to a xarray dataset takes much more time than doing the same with a numpy array. Would there be a way to accelerate that ?

Here is everything that I tested by alternatively uncommenting each line in the loop:

...

ANSWER

Answered 2021-Dec-17 at 01:14

If you're going to be referencing the data using positional indices, you could definitely do the indexing within numpy, e.g. ds['iasi'].data[0, 0, 0, 0] = 3.1416. But the general assumption you should have is that xarray will have worse performance compared with numpy, as every operation you do in xarray is a bunch of python overhead, plus any pandas-based indexing you're doing, on top of the corresponding numpy operation.

That said, xarray works hard to add only a modest penalty on top of the underlying array operations. Importantly, the overhead will be felt most acutely when performing small operations. The larger the array, the more xarray's performance will approach numpy's, as the bulk of the work will be on the array itself, not in cueing it up with indexing, metadata management, and other elements that xarray adds on top.

To illustrate this, I've set up a side-by side comparison where we first initialize a (very large) empty numpy array, then progressively fill the first 1, then 10, then 100, then 1000, etc. elements until we've filled the entire (1000, 1000, 100) array with zeros:

Source https://stackoverflow.com/questions/70379441

QUESTION

xarray assigning individual values to one variable/dataArray ends up assigning to all variables/dataArray

Asked 2021-Dec-15 at 18:24

I have a script where I create a big xarray dataset full of np.nan and then assign individual values in a loop, with .loc (I also tried with positional indexing) (doc)

I get something quite weird.

Here is my minimal reproducible example :

...

ANSWER

Answered 2021-Dec-15 at 16:46

okey, I have understood my mistake: emptyDA is not copied for each new variable but point to the same object. Inserting emptyDA.copy() instead of emptyDA resolve the problem. I thought that the creation of the xarray object would have copied the data. Thanks for your help

Source https://stackoverflow.com/questions/70339322

QUESTION

Listener oracle in pacemaker cluster

Asked 2021-Oct-27 at 10:53

I need some help. I have created a cluster with 2 nodes. I created all resources, but listener has errors and the pacemaker cluster status shows Oracle Listener has stopped.

In the web interface I have the following error messages:

Failed to start listener_or on Mon Oct 25 16:30:52 2021 on node lha1: Listener pdb1 appears to have started, but is not running properly:

and

Unable to get metadata for resource agent 'ocf:heartbeat:oralsnr' (timeout)

In pacemaker cluster status I have the following error message:

listener_or_start_0 on lha1 'error' (1): call=35, status='complete', exitreason='Listener pdb1 appears to have started, but is not running properly: ', last-rc-change='2021-10-25 16:30:52 +03:00', queued=0ms, exec=393ms

However, I can connect to the base.

Do you have any ideas how I could solve this issue?

...

ANSWER

Answered 2021-Oct-27 at 10:53

The issue was that the agent couldn't see the Oracle listener.

The solution was to:

Create tnsnames.ora
Write configurtion
Reload services

After this the pcs didn't have any errors.

Source https://stackoverflow.com/questions/69709065

QUESTION

What am I missing on how to change the df.to_csv outfile name for looping through a folder?

Asked 2021-Aug-25 at 22:56

I have a folder of 16 files and instead of doing it manually every quarter (names will change) I want to write a script that reads in space delimited data and outputs comma delimited. The input files are .out and the output I want are .csv but with some of the name removed for example: bls_2.out ---> bls.csv

'''

...

ANSWER

Answered 2021-Aug-25 at 22:56

It looks like you have to remove the file extension before writing a new one. This can be done with os.path.splitext. Also, to get the .csv in the original directory, you'll have to join those paths.

Source https://stackoverflow.com/questions/68930516

QUESTION

Pacemaker not able to start slave node on postgres-11

Asked 2021-Jun-29 at 06:03

I have 2 nodes (named node03 and node04) in a Master-slave, hot standby setup using pacemaker to manage the cluster. Before a switchover, node04 was the master and 03 was the standby. After the switchover, I have been trying to bring the node04 back again as the slave node but not able to do it.

During the switchover I realized that someone had changed the config file and set the ignore_system_indexes parameter to true. I had to remove it and restart the postgres server manually. It was after this that the cluster started behaving oddly.

The node04 can be brought back up as slave node manually, i.e., if I start postgres instance manually and use the recovery.conf file.

Here are the files needed to understand the situation:

...

ANSWER

Answered 2021-Jun-29 at 06:03

As mentioned in the question that pacemaker, upon putting node04 on unstandby, pacemaker was demoting node03 and tried to make node04 as the master. It would fail in this task and then later make node03 as the standalone master.
Since I was doubting that it was picking some old configuration from cib or pengine folder, I even destroyed the cluster on both nodes, removed pacemaker, pcs and corosync and re-installed all of them.
Even after all of that, the problem still persisted. Then I doubted that maybe the folder permission of the /var/lib/pgsql/ folder on node04 might not be right and started exploring it.
Only then did I realize that there was an old PGSQL.lock.bak file, which was dated June 11, which means it was older than the current PGSQL.lock file in node03, and thus pacemaker tried to promote node04 and would fail. Pacemaker would not show this as an error in any logs. There is no information about it even on the crm_mon output. Once I removed this file, it worked like a charm.

TLDR;

Check if there are any PGSQL.lock.bak or any other unnecessary files in the /var/lib/pgsql/tmp folder and remove them before starting pacemaker again.

Source https://stackoverflow.com/questions/68159019

QUESTION

Docker version is different from what was intended from the command

Asked 2021-May-13 at 19:56

[root@asok-4-openstack yum.repos.d]# yum install docker-ce-20.10.2*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: la.mirrors.clouvider.net
 * extras: mirrors.ocf.berkeley.edu
 * updates: sjc.edge.kernel.org
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 3:20.10.2-3.el7 will be installed
--> Processing Dependency: container-selinux >= 2:2.74 for package: 3:docker-ce-20.10.2-3.el7.x86_64
--> Processing Dependency: containerd.io >= 1.4.1 for package: 3:docker-ce-20.10.2-3.el7.x86_64
--> Processing Dependency: docker-ce-cli for package: 3:docker-ce-20.10.2-3.el7.x86_64
--> Processing Dependency: docker-ce-rootless-extras for package: 3:docker-ce-20.10.2-3.el7.x86_64
--> Running transaction check
---> Package container-selinux.noarch 2:2.119.2-1.911c772.el7_8 will be installed
---> Package containerd.io.x86_64 0:1.4.4-3.1.el7 will be installed
---> Package docker-ce-cli.x86_64 1:20.10.6-3.el7 will be installed
--> Processing Dependency: docker-scan-plugin(x86-64) for package: 1:docker-ce-cli-20.10.6-3.el7.x86_64
---> Package docker-ce-rootless-extras.x86_64 0:20.10.6-3.el7 will be installed
--> Processing Dependency: fuse-overlayfs >= 0.7 for package: docker-ce-rootless-extras-20.10.6-3.el7.x86_64
--> Processing Dependency: slirp4netns >= 0.4 for package: docker-ce-rootless-extras-20.10.6-3.el7.x86_64
--> Running transaction check
---> Package docker-scan-plugin.x86_64 0:0.7.0-3.el7 will be installed
---> Package fuse-overlayfs.x86_64 0:0.7.2-6.el7_8 will be installed
--> Processing Dependency: libfuse3.so.3(FUSE_3.2)(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
--> Processing Dependency: libfuse3.so.3(FUSE_3.0)(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
--> Processing Dependency: libfuse3.so.3()(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
---> Package slirp4netns.x86_64 0:0.4.3-4.el7_8 will be installed
--> Running transaction check
---> Package fuse3-libs.x86_64 0:3.6.1-4.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

======================================================================================
 Package                   Arch   Version                      Repository        Size
======================================================================================
Installing:
 docker-ce                 x86_64 3:20.10.2-3.el7              docker-ce-stable  27 M
Installing for dependencies:
 container-selinux         noarch 2:2.119.2-1.911c772.el7_8    extras            40 k
 containerd.io             x86_64 1.4.4-3.1.el7                docker-ce-stable  33 M
 docker-ce-cli             x86_64 1:20.10.6-3.el7              docker-ce-stable  33 M
 docker-ce-rootless-extras x86_64 20.10.6-3.el7                docker-ce-stable 9.2 M
 docker-scan-plugin        x86_64 0.7.0-3.el7                  docker-ce-stable 4.2 M
 fuse-overlayfs            x86_64 0.7.2-6.el7_8                extras            54 k
 fuse3-libs                x86_64 3.6.1-4.el7                  extras            82 k
 slirp4netns               x86_64 0.4.3-4.el7_8                extras            81 k

Transaction Summary
======================================================================================
Install  1 Package (+8 Dependent packages)

Total download size: 107 M
Installed size: 438 M
Is this ok [y/d/N]: y
Downloading packages:
(1/9): container-selinux-2.119.2-1.911c772.el7_8.noarch.rpm    |  40 kB  00:00:00
warning: /var/cache/yum/x86_64/7/docker-ce-stable/packages/docker-ce-20.10.2-3.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
Public key for docker-ce-20.10.2-3.el7.x86_64.rpm is not installed
(2/9): docker-ce-20.10.2-3.el7.x86_64.rpm                      |  27 MB  00:00:00
(3/9): containerd.io-1.4.4-3.1.el7.x86_64.rpm                  |  33 MB  00:00:00
(4/9): docker-ce-cli-20.10.6-3.el7.x86_64.rpm                  |  33 MB  00:00:00
(5/9): docker-scan-plugin-0.7.0-3.el7.x86_64.rpm               | 4.2 MB  00:00:00
(6/9): docker-ce-rootless-extras-20.10.6-3.el7.x86_64.rpm      | 9.2 MB  00:00:00
(7/9): fuse-overlayfs-0.7.2-6.el7_8.x86_64.rpm                 |  54 kB  00:00:00
(8/9): slirp4netns-0.4.3-4.el7_8.x86_64.rpm                    |  81 kB  00:00:00
(9/9): fuse3-libs-3.6.1-4.el7.x86_64.rpm                       |  82 kB  00:00:00
--------------------------------------------------------------------------------------
Total                                                     49 MB/s | 107 MB  00:02
Retrieving key from https://download.docker.com/linux/centos/gpg
Importing GPG key 0x621E9F35:
 Userid     : "Docker Release (CE rpm) "
 Fingerprint: 060a 61c5 1b55 8a7f 742b 77aa c52f eb6b 621e 9f35
 From       : https://download.docker.com/linux/centos/gpg
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                 1/9
  Installing : containerd.io-1.4.4-3.1.el7.x86_64                                 2/9
  Installing : 1:docker-ce-cli-20.10.6-3.el7.x86_64                               3/9
  Installing : docker-scan-plugin-0.7.0-3.el7.x86_64                              4/9
  Installing : slirp4netns-0.4.3-4.el7_8.x86_64                                   5/9
  Installing : fuse3-libs-3.6.1-4.el7.x86_64                                      6/9
  Installing : fuse-overlayfs-0.7.2-6.el7_8.x86_64                                7/9
  Installing : 3:docker-ce-20.10.2-3.el7.x86_64                                   8/9
  Installing : docker-ce-rootless-extras-20.10.6-3.el7.x86_64                     9/9
  Verifying  : fuse3-libs-3.6.1-4.el7.x86_64                                      1/9
  Verifying  : 3:docker-ce-20.10.2-3.el7.x86_64                                   2/9
  Verifying  : docker-ce-rootless-extras-20.10.6-3.el7.x86_64                     3/9
  Verifying  : fuse-overlayfs-0.7.2-6.el7_8.x86_64                                4/9
  Verifying  : docker-scan-plugin-0.7.0-3.el7.x86_64                              5/9
  Verifying  : slirp4netns-0.4.3-4.el7_8.x86_64                                   6/9
  Verifying  : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                 7/9
  Verifying  : 1:docker-ce-cli-20.10.6-3.el7.x86_64                               8/9
  Verifying  : containerd.io-1.4.4-3.1.el7.x86_64                                 9/9

Installed:
  docker-ce.x86_64 3:20.10.2-3.el7

Dependency Installed:
  container-selinux.noarch 2:2.119.2-1.911c772.el7_8
  containerd.io.x86_64 0:1.4.4-3.1.el7
  docker-ce-cli.x86_64 1:20.10.6-3.el7
  docker-ce-rootless-extras.x86_64 0:20.10.6-3.el7
  docker-scan-plugin.x86_64 0:0.7.0-3.el7
  fuse-overlayfs.x86_64 0:0.7.2-6.el7_8
  fuse3-libs.x86_64 0:3.6.1-4.el7
  slirp4netns.x86_64 0:0.4.3-4.el7_8

Complete!
[root@asok-4-openstack yum.repos.d]# docker --version
Docker version 20.10.6, build 370c289
[root@asok-4-openstack yum.repos.d]#

...

ANSWER

Answered 2021-May-13 at 19:56

You did install docker-ce 20.10.2. The docker-ce-CLI is what is at 20.10.6.

Source https://stackoverflow.com/questions/67525415

QUESTION

Having trouble stopping U-Boot autoboot

Asked 2021-Apr-22 at 15:51

Background:

I have an old Seagate BlackArmor NAS 110 that I'm trying to install Debian on by following the instructions here: https://github.com/hn/seagate-blackarmor-nas.

I have a couple of USB to TTL serial adapters (one FTDI chipset and the other Prolific) that I've tried and have run into the same issue with both. I have made the connection to the serial port on the board of the NAS using a multimeter to make sure I've gotten the pinout correct.

Problem:

I'm not able to stop the autoboot process by pressing keys and any point during the boot process. The device also does not seem to respond to any keystrokes although they are echoed back.

What I've Tried So Far:

Using USB to TTL serial adapters with two different chipsets
Using the adapters on two different computers (MacBook Pro and a ThinkPad)
Using different operating systems (MacOS, Windows 10, Ubuntu 20.04)
Using different terminal programs (Screen, Minicom, Putty)
Turned off hardware and software flow control
Tested output of adapters by shorting RX and TX pins and seeing keystrokes echoed back
Commands seem to be sent to device as when I type I see my commands echoed back (not sure if this is supposed to happen)

I've been at this for a few days and can't figure it out. I've also recorded my screen while experiencing the issue: https://streamable.com/xl43br. Can anyone see where I'm going wrong?

Terminal output while experiencing the problem:

...

ANSWER

Answered 2021-Apr-22 at 15:51

So it turns out there is a short somewhere between the RX pin and the +3.3V pin which is not allowing me to send anything to the board. Thank you to those who have commented.

Source https://stackoverflow.com/questions/67169585

QUESTION

Ansible - Set-fact with loop variable?

Asked 2021-Apr-09 at 15:45

To be honest, I am not exactly sure what I am trying to do is technically called but will try to explain the best I can.

End_result:

I would like a list and/or JSON of data that looks similar to this:

...

ANSWER

Answered 2021-Apr-07 at 20:37

There seems to be something broken:

in your regular expression
in the complexity you are bringing in your loop

With regex_findall you can get a list of all the matches, so you don't need to have multiple regex_findall.

The resulting list would actually be a list of list contains all the matches, then for each matches line, the fragments that you are capturing with the capturing groups of your regular expression.

So, given:

Source https://stackoverflow.com/questions/66988037

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