Akonadi/am: Difference between revisions

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<languages />
<languages />


<span id="Introduction"></span>
==አኮናዲ==
==አኮናዲ==


The '''Akonadi''' framework is responsible for providing applications with a centralized database to store, index and retrieve the user's personal information. This includes the user's emails, contacts, calendars, events, journals, alarms, notes, etc. In SC 4.4, [[Special:myLanguage/KAddressBook|KAddressBook]] became the first application to start using the '''Akonadi''' framework. In SC 4.7,
The '''Akonadi''' framework is responsible for providing applications with a centralized database to store, index and retrieve the user's personal information. This includes the user's emails, contacts, calendars, events, journals, alarms, notes, etc.
[[Special:myLanguage/KMail|KMail]], [[Special:myLanguage/KOrganizer|KOrganizer]], [[Special:myLanguage/KJots|KJots]], etc. were updated to use '''Akonadi''' as well. In addition, several [[Special:myLanguage/Plasma|Plasma]] widgets also use '''Akonadi''' to store and retrieve calendar events, notes, etc.


At the time of writing, the following applications are enabled to use the '''Akonadi''' framework to centrally store and access user data. Follow through to each application's page to learn more.
Currently, all [https://kontact.kde.org/ KDE PIM applications] with the exception of [[Special:myLanguage/Akregator|Akregator]] are using '''Akonadi''' to access user's PIM data.
<span id="ApplicationTable"></span>
:{|
{{AppItem|KMail|View-pim-mail.png|
KMail}}Mail Client
Uses '''Akonadi''' to store emails
|-
{{AppItem|KAddressBook|View-pim-contacts.png|
KAddressBook}}የሚጠቀመው '''አኮናዲን'''  ነው የግንኙነት መረጃዎችን ለማጠራቀም
|-
{{AppItem|KOrganizer|View-pim-calendar.png|
KOrganizer}}ይጠቀሙ '''አኮናዲን'''  ቀን መቁጠሪያ ፡ ሁኔታዎችን ፡ ማስታወሻዎችን ለማስቀመጫ ወዘተ...
|-
{{AppItem|KJots|kjots.png|
KJots}}ይጠቀሙ '''አኮናዲን'''  ማስታወሻዎችን ለማስቀመጥ
|-
{{AppItem|KAlarm|kalarm.png|
KAlarm}}Personal alarm scheduler
Uses '''Akonadi''' to store alarms
|}


In addition to this, plasma widgets like the '''Digital Clock''' widget, the '''Notes''' widget also use '''Akonadi''' to store and retrieve events and notes.
<span id="Controlling_Akonadi"></span>
<div class="mw-translate-fuzzy">
==የአኮናዲን ሰርቨር መቆጣጠሪያ==
</div>


==የአኮናዲን ሰርቨር መቆጣጠሪያ==
'''Akonadi''' will start automatically in the background when any application using it is started.


'''አኮናዲ'''  መቆጣጠሪያ ዘዴ በ  '''ስርአት ማሰናጃ'''  ውስጥ በቀላሉ እንዴት እንደሚጀምሩ ፡ እንደሚያቆሙ ፡ እንደገና እንደሚያስጀምሩ እና እንዴት እንደሚጠይቁ ስለ  '''አኮናዲ'''  ሰርቨር ሁኔታ ያስረዳል። ይህንኑ ሁኔታ በትእዛዝ መስመር መፈጸም ይችላሉ '''akonadictl'''.
To manually start, stop or restart '''Akonadi''', you can use the <code>akonadictl</code> command from the commandline.
Using this method, you can get additional useful information on the console.


የ '''አኮናዲን '''  ሰርቨር ለማስጀመር
የ '''አኮናዲን '''  ሰርቨር ለማስጀመር
Line 49: Line 34:
{{Input|1=akonadictl status}}
{{Input|1=akonadictl status}}


===ሰለ ማሰናከል የአኮናዲን ንዑስ ስርአት
===Disabling the Akonadi subsystem===
 
The '''Akonadi''' server is automatically started by any '''Akonadi'''-enabled application. If you don't want Akonadi to be started after login, you have to ensure that no '''Akonadi'''-enabled application is launched at login or thereafter. Remember to check '''Plasma''' applets as well — the '''Digital Clock''' widget in the default panel, for instance uses '''Akonadi''' to (optionally) display calendar events and this is enabled in its settings by default (see the "Display Events" option) .  You must remove any widgets that may start it from your start-up, if you wish Akonadi to start only when you start '''KMail''' or other applications.
 
{{Remember|1=If you don't want to have '''Akonadi''' running on your system at all, you can not use any of the '''Akonadi'''-enabled applications, such as KMail, KOrganizer or KAddressbook. Such applications will not work when '''Akonadi''' is disabled using the steps below. Also note, that some '''Plasma''' widgets, such as the '''Digital Clock''' uses '''Akonadi'''.}}
 
To ensure that '''Akonadi''' is not started, check that no applications require it at login. In particular, open the Plasma clock applet preferences, go to <menuchoice>Calendar</menuchoice> and uncheck <menuchoice>Show events</menuchoice> to prevent Plasma from requesting information from '''Akonadi''' and thus allowing it to start.
 
==Some Definitions==
 
;Real data
:By ''real data'' we mean the data, like the contacts or events. These data are stored either on a groupware server or in local files. Where exactly depends on the resource you are using. E.g. the ''Personal Contacts'' resource stores its data under ''$XDG_DATA_HOME/contacts''.


{{Remember|1=If you don't want to have '''Akonadi''' running on your system, you can not use any of the '''Akonadi'''-enabled applications. Such applications will start '''Akonadi''', whenever they need its services even if you have disabled it. See the list of [[Special:myLanguage/Akonadi#ApplicationTable|Akonadi-enabled applications]]. Also note, that some '''Plasma''' widgets, such as the '''Digital Clock''' uses '''Akonadi'''}}
;Cached data
:The ''cached data'' are copies of the real data that are kept in the database for faster access and offline caching. The database also keeps the ''meta data'' which are management data needed by '''Akonadi''' to work correctly.


የ  '''አኮናዲ''' ሰርቨር የሚጀምረው ራሱ በራሱ ነው መቼም ሲገቡ  '''አኮናዲ''' የሚያካሄዳቸው መተግበሪያዎችን ካስቻሉ ለመጀመር ፍቃድ ይጠይቃሉ
;Configuration data
:The ''configuration data'' are the data that configure the '''Akonadi''' server and the individual resources. The general configuration data for the server can be found under ''$XDG_CONFIG_HOME/akonadi''. The configuration data for each indvidual resources are stored under ''$XDG_CONFIG_HOME/akonadi_xyz_resourcerc#'' ('''''xyz''''' is name of resource and '''''#''''' its instance number).


ለማሰናከል የ  '''አኮናዲን''' ንዑስ ስርአት በመጀመሪያ የሚሄደውን የአኮናዲ ሰርቨር ይዝጉ ከመቆጣጠሪያው ክፍል ወይም በትእዛዝ መስመር
:The '''Akonadi''' server configuration is a couple of files in ''$XDG_CONFIG_HOME/akonadi''. It contains which data sources and helper programs are active and will be started and watched (so they can be restarted on crashes) by one of '''Akonadi's''' server processes '''(akonadi_control)'''.


{{Input|1=akonadictl stop}}
:Each data source handler (called resources) or helper program (called agents) can have its own configuration although some agents or resources don't require configuration. The general rule is that for every entry in ''$XDG_CONFIG_HOME/akonadi/agentsrc'' there is a corresponding configuration file in ''$XDG_CONFIG_HOME''.  For example, if the ''[Instances]'' section in ''agentrc'' contains an entry for ''akonadi_ical_resource_2'', there is also a config file called ''akonadi_ical_resource_2rc'' in the ''$XDG_CONFIG_HOME directory''.
 
:Depending on the type of data, such config files for resources will have filenames or directory names of where the data is stored.  Common locations are KDE's legacy default files, e.g. ''$HOME/.kde/share/apps/korganizer/std.ics''.  New default locations are files and directories in ''$XDG_DATA_HOME'', e.g. ''$XDG_DATA_HOME/contacts''.


Now, edit the file <tt>~/.config/akonadi/akonadiserverrc</tt> and change <tt>StartServer</tt> from true to false:
==Backup==


{{Input|1=StartServer=false}}
So now we need to decide what to back up.  If you want to backup the "real data", then it depends on the resources you have configured... if you use a groupware server, then the backup should be done there. For contacts, the files under ''$XDG_DATA_HOME/contacts'' will normally be what you need.


የ  '''አኮናዲ''' ሰርቨር በሚገቡ ጊዜ እንደ በፊቱ ራሱ በራሱ አይጀምርም
To back up the entire ''Akonadi'' configuration, including which resources are active and their configuration, you can use the '''pimdataexporter''' tool. This, however doesn't back up the Akonadi database containing the cached data and, unfortunately, after restoring the configuration (using the '''pimdataexporter'' again), Akonadi will have to re-fetch all data again into its cache. This can cause configuration that points to actual mail folders or calendars to get broken and accidentally point to another folder.


{{Note|1=The '''Akonadi''' server will still be started by any '''Akonadi'''-enabled application. Ensure that no '''Akonadi'''-enabled application is launched at login or thereafter. Remember to check '''Plasma''' widgets as well — the '''Digital Clock''' widget in the default panel, for instance uses '''Akonadi''' to (optionally) display calendar events and this is enabled in its settings by default.  You must remove any widgets that may start it from your start-up, if you wish Akonadi to remain disabled.}}
'''After restoring configuration and syncing all data, it's vital to manually check all folder configuration, especially in KMail identities and make sure the folders are configured properly.'''


<span id="Frequently_Asked_Questions"></span>
==ብዙ ጊዜ የሚጠየቁ ጥያቄዎች==
==ብዙ ጊዜ የሚጠየቁ ጥያቄዎች==


=== Where is my data now? ===
=== Where is my data now? ===


A full explanation of where the data is stored and Akonadi's interaction with it is available in [http://blogs.kde.org/node/4503 Andras Mantia's blog]
Your data are safely stored outside of '''Akonadi''' control on your disk (e.g. local maildir folder or iCal calendar), or on a remote server (in case of e.g. email over IMAP or events from a CalDAV calendar). '''Akonadi''' will optionally store a copy of this data in its database to allow applications to quickly retrieve and display them. Any modifications done to data in the '''Akonadi''' database will be synced to the actual storage. The main advantage of using the database as a cache is that remote PIM data are available even when you are offline, and you can still interact with them (e.g. mark emails as read or move them, create new events, reschedule existing meetings etc.) and all the changes will get synced automatically once you connect to the internet again.
 
Thus, deleting the '''Akonadi''' database will not cause any data to be lost (as long as all pending changes are synced).
 
=== How to upgrade my PostgreSQL database? ===
 
After updating your PostgreSQL server to a new major version, sometimes you will have to convert your Akonadi database for use with this new version. Instructions can be found on [[Special:myLanguage/Akonadi/Postgres_update|this page]].


=== Migration problems ===
=== Migration problems ===


Refer to [[Special:myLanguage/Akonadi_4.4/Troubleshooting|the Troubleshooting page]] for resolving glitches during migration. '''Akonadi's''' [[Special:myLanguage/Glossary#Akonadi|Glossary entry]] has a brief description of its purpose and other useful links. [[Special:myLanguage/Akonadi_and_AddressBook|This]] page explains how '''Akonadi''' and '''KAddressBook''' work together.
'''Akonadi's''' [[Special:myLanguage/Glossary#Akonadi|Glossary entry]] has a brief description of Akonadi's purpose, and other useful links.


=== High CPU or Memory usage ===
=== How do I switch from MySQL/PostgreSQL to SQLite? ===


If you are experiencing 100% CPU usage by the ''virtuoso-t'' process when using '''Akonadi''' and related applications, try this proposed workaround while it is being investigated: In '''KRunner's''' configuration page, disable the '''Nepomuk''' search plugin and the '''Contact''' plugin. Then, log out and back in. For further information and inputs, report back here or on the Forum or on the IRC channel #kontact.
Since Akonadi 6 [https://invent.kde.org/pim/akonadi/-/merge_requests/154 akonadi-db-migrator] is included in akonadi that allows you to switch the database backend. Where for previous versions this involved deleting and recreating the database a migration is now properly supported by akonadi.


=== Akonadi and Nepomuk, why? ===
The tool needs to be called with the parameter --newengine to chose to which backend it should to:
{{{
  --newengine <ENGINE>      The new DB engine to use. Possible values are
                            "sqlite", "mysql" and "postgres"
}}}


There is often a good deal of confusion aboujt Akonadi and Nepomuk.  [http://cmollekopf.wordpress.com/2013/02/13/kontact-nepomuk-integration-why-data-from-akonadi-is-indexed-in-nepomuk/ Why data from Akonadi is indexed in Nepomuk] explains exactly why we have both, and what their roles are.  Don't miss the additional information from [http://en.opensuse.org/User:Wstephenson Will Stephenson] in the Comments section.
For example:
{{{
akonadi-db-migrator --newengine sqlite
}}}


[[Category:System/am]]
[[Category:System/am]]

Latest revision as of 07:03, 10 August 2024

አኮናዲ

The Akonadi framework is responsible for providing applications with a centralized database to store, index and retrieve the user's personal information. This includes the user's emails, contacts, calendars, events, journals, alarms, notes, etc.

Currently, all KDE PIM applications with the exception of Akregator are using Akonadi to access user's PIM data.

የአኮናዲን ሰርቨር መቆጣጠሪያ

Akonadi will start automatically in the background when any application using it is started.

To manually start, stop or restart Akonadi, you can use the akonadictl command from the commandline. Using this method, you can get additional useful information on the console.

አኮናዲን ሰርቨር ለማስጀመር

akonadictl start

አኮናዲን ሰርቨር ለማስቆም

akonadictl stop

እንደገና ለማስጀመር እየሄደ ያለ አኮናዲ ሰርቨር

akonadictl restart

ለመጠየቅ ስለ አኮናዲ ሰርቨር ሁኔታ

akonadictl status

Disabling the Akonadi subsystem

The Akonadi server is automatically started by any Akonadi-enabled application. If you don't want Akonadi to be started after login, you have to ensure that no Akonadi-enabled application is launched at login or thereafter. Remember to check Plasma applets as well — the Digital Clock widget in the default panel, for instance uses Akonadi to (optionally) display calendar events and this is enabled in its settings by default (see the "Display Events" option) . You must remove any widgets that may start it from your start-up, if you wish Akonadi to start only when you start KMail or other applications.

Remember

If you don't want to have Akonadi running on your system at all, you can not use any of the Akonadi-enabled applications, such as KMail, KOrganizer or KAddressbook. Such applications will not work when Akonadi is disabled using the steps below. Also note, that some Plasma widgets, such as the Digital Clock uses Akonadi.


To ensure that Akonadi is not started, check that no applications require it at login. In particular, open the Plasma clock applet preferences, go to Calendar and uncheck Show events to prevent Plasma from requesting information from Akonadi and thus allowing it to start.

Some Definitions

Real data
By real data we mean the data, like the contacts or events. These data are stored either on a groupware server or in local files. Where exactly depends on the resource you are using. E.g. the Personal Contacts resource stores its data under $XDG_DATA_HOME/contacts.
Cached data
The cached data are copies of the real data that are kept in the database for faster access and offline caching. The database also keeps the meta data which are management data needed by Akonadi to work correctly.
Configuration data
The configuration data are the data that configure the Akonadi server and the individual resources. The general configuration data for the server can be found under $XDG_CONFIG_HOME/akonadi. The configuration data for each indvidual resources are stored under $XDG_CONFIG_HOME/akonadi_xyz_resourcerc# (xyz is name of resource and # its instance number).
The Akonadi server configuration is a couple of files in $XDG_CONFIG_HOME/akonadi. It contains which data sources and helper programs are active and will be started and watched (so they can be restarted on crashes) by one of Akonadi's server processes (akonadi_control).
Each data source handler (called resources) or helper program (called agents) can have its own configuration although some agents or resources don't require configuration. The general rule is that for every entry in $XDG_CONFIG_HOME/akonadi/agentsrc there is a corresponding configuration file in $XDG_CONFIG_HOME. For example, if the [Instances] section in agentrc contains an entry for akonadi_ical_resource_2, there is also a config file called akonadi_ical_resource_2rc in the $XDG_CONFIG_HOME directory.
Depending on the type of data, such config files for resources will have filenames or directory names of where the data is stored. Common locations are KDE's legacy default files, e.g. $HOME/.kde/share/apps/korganizer/std.ics. New default locations are files and directories in $XDG_DATA_HOME, e.g. $XDG_DATA_HOME/contacts.

Backup

So now we need to decide what to back up. If you want to backup the "real data", then it depends on the resources you have configured... if you use a groupware server, then the backup should be done there. For contacts, the files under $XDG_DATA_HOME/contacts will normally be what you need.

To back up the entire Akonadi configuration, including which resources are active and their configuration, you can use the pimdataexporter' tool. This, however doesn't back up the Akonadi database containing the cached data and, unfortunately, after restoring the configuration (using the pimdataexporter again), Akonadi will have to re-fetch all data again into its cache. This can cause configuration that points to actual mail folders or calendars to get broken and accidentally point to another folder.

After restoring configuration and syncing all data, it's vital to manually check all folder configuration, especially in KMail identities and make sure the folders are configured properly.

ብዙ ጊዜ የሚጠየቁ ጥያቄዎች

Where is my data now?

Your data are safely stored outside of Akonadi control on your disk (e.g. local maildir folder or iCal calendar), or on a remote server (in case of e.g. email over IMAP or events from a CalDAV calendar). Akonadi will optionally store a copy of this data in its database to allow applications to quickly retrieve and display them. Any modifications done to data in the Akonadi database will be synced to the actual storage. The main advantage of using the database as a cache is that remote PIM data are available even when you are offline, and you can still interact with them (e.g. mark emails as read or move them, create new events, reschedule existing meetings etc.) and all the changes will get synced automatically once you connect to the internet again.

Thus, deleting the Akonadi database will not cause any data to be lost (as long as all pending changes are synced).

How to upgrade my PostgreSQL database?

After updating your PostgreSQL server to a new major version, sometimes you will have to convert your Akonadi database for use with this new version. Instructions can be found on this page.

Migration problems

Akonadi's Glossary entry has a brief description of Akonadi's purpose, and other useful links.

How do I switch from MySQL/PostgreSQL to SQLite?

Since Akonadi 6 akonadi-db-migrator is included in akonadi that allows you to switch the database backend. Where for previous versions this involved deleting and recreating the database a migration is now properly supported by akonadi.

The tool needs to be called with the parameter --newengine to chose to which backend it should to: {{{

 --newengine <ENGINE>       The new DB engine to use. Possible values are 
                            "sqlite", "mysql" and "postgres"

}}}

For example: {{{ akonadi-db-migrator --newengine sqlite }}}