openstack
/
freezer
Code Issues Proposed changes

fix a typo in FAQ.rst 

trivial

Change-Id: I931c6e258bffb2878e9ff0e1a9d7b2cbbefca9b7
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Luong Anh Tuan 2016-10-17 17:31:20 +07:00 committed by Tuan Luong-Anh
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FAQ.rst
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@ -2,24 +2,24 @@
FAQ
===
1) **What is freezer**?
1) **What is freezer?**
Is a tool to automate data backup and restore
process using OpenStack Swift and/or other media storage
process using OpenStack Swift and/or other media storage.
2) **Does freezer support incremental backup?**
Yes. Incremental backup are done using GNU tar incremental features
Yes. Incremental backup are done using GNU tar incremental features.
3) **Does freezer check the file contents to establish if a file was modified?**
Freezer check for changes at mtime and ctime in
every file inode to evaluate if a file changed or not.
4) **Why GNU tar rather then rsync?**
4) **Why GNU tar rather than rsync?**
Both approaches are good. Rsync check
the file content, while tar check the file inode. In our
environment, we need to backup directories with size > 400GB and
hundreds of thousands of files. Rsync approach is effective but slow.
Tar is fast as it needs to check only the file inodes, rather then
the full file content. Rsync backup type will be added pretty soon
Tar is fast as it needs to check only the file inodes, rather than
the full file content. Rsync backup type will be added pretty soon.
5) *Does freezer support encrypted backup?*
Yes. Freezer encrypt data using OpenSSL (AES-256-CFB).
@ -35,7 +35,7 @@ FAQ
8) **What Application backup does freezer support currently?**
MongoDB, MySQL to have a higher level of data consistency, while
any appplication is supported for crash consistent data integrity.
any application is supported for crash consistent data integrity.
9) **How does the MongoDB backup happens?**
Freezer required journal enabled in Mongo and lvm volume to execute backup.
@ -59,7 +59,7 @@ FAQ
c. Directory in the local host (i.e. NFS/CIFS mounted volumes)
14) **Does freezer has any Web UI or API?**
Yes. Freezer has REST API and a Web UI integrated with Horizon
Yes. Freezer has REST API and a Web UI integrated with Horizon.
15) **Does Freezer detect removed files between incremental executions?**
Yes.
@ -68,20 +68,22 @@ FAQ
We hope so, as soon as we can.
17) **Does freezer support Windows?**
Yes. The freezer agent and scheduler can be executed on Windows
Yes. The freezer agent and scheduler can be executed on Windows.
18) **What is being used on Windows to execute file system snapshots?**
Curretnly VSS are used to support point in time snapshots
Currently VSS are used to support point in time snapshots.
19) **What applications are supported in Windows for consisten backups?**
SQL Server (--mode sqlserver)
19) **What applications are supported in Windows for consistent backups?**
SQL Server (--mode sqlserver).
20) **Are there examples of OpenStack projects that use Freezer that I can look at?**
Not currently
Not currently.
21) **My service has it's own task scheduler. What is the recommended way to schedule Freezer runs?**
If you want to use the freezer-api and freezer-web-ui in horizon, you need to use the freezer-scheduler.
If you do not need the api and web ui, you can just execute the freezer-agent from crontab or any other scheduler.
If you want to use the freezer-api and freezer-web-ui in horizon, you need to use the
freezer-scheduler.
If you do not need the api and web ui, you can just execute the freezer-agent from crontab or
any other scheduler.
22) **What are the benefits of using the API and Web UI?**
- You can start backup and restore jobs on any node from the Web UI
@ -95,7 +97,8 @@ FAQ
dependencies.
24) **What are the options for backing up MySQL/Percona?**
a. Make use of filesystem snapshots (LVM) using the "--mode mysql" option. It's supported natively by Freezer and suitable for large databases.
a. Make use of filesystem snapshots (LVM) using the "--mode mysql" option. It's supported
natively by Freezer and suitable for large databases.
This instructs freezer to execute the following steps:
- flush tables and lock the DB
- take an LVM snapshot