~ubuntu-branches/ubuntu/trusty/systemd/trusty

turns off all storage, all log data received will be dropped\&. Forwarding to other targets, such as the console, the kernel log buffer or a syslog daemon will still work however\&. Defaults to

auto\&.

.RE

.PP

\fICompress=\fR

.RS 4

Takes a boolean value\&. If enabled (the default) data objects that shall be stored in the journal and are larger than a certain threshold are compressed with the XZ compression algorithm before they are written to the file system\&.

.RE

.PP

\fISeal=\fR

.RS 4

Takes a boolean value\&. If enabled (the default) and a sealing key is available (as created by

\fBjournalctl\fR(1)\*(Aqs

\fB\-\-setup\-keys\fR

command), forward secure sealing (FSS) for all persistent journal files is enabled\&.

.RE

.PP

\fISplitMode=\fR

.RS 4

Controls whether to split up journal files per user\&. One of

uid

and

none\&. If

each logged in user will get his own journal files, but systemd user IDs will log into the system journal\&. If

uid

any user ID will get his own journal files regardless whether it belongs to a system service or refers to a real logged in user\&. If

none

journal files are not split up per\-user and all messages are stored in the single system journal\&. Note that splitting up journal files per\-user is only available of journals are stored persistently\&. If journals are stored on volatile storage (see above) only a single journal file for all user IDs is kept\&. Defaults to

100

101

.RE

102

.PP

103

\fIRateLimitInterval=\fR, \fIRateLimitBurst=\fR

104

.RS 4

105

Configures the rate limiting that is applied to all messages generated on the system\&. If in the time interval defined by

106

\fIRateLimitInterval=\fR

107

more messages than specified in

108

\fIRateLimitBurst=\fR

109

are logged by a service all further messages within the interval are dropped, until the interval is over\&. A message about the number of dropped messages is generated\&. This rate limiting is applied per\-service, so that two services which log do not interfere with each others\*(Aq limits\&. Defaults to 200 messages in 10s\&. The time specification for

110

\fIRateLimitInterval=\fR

111

may be specified in the following units:

112

113

min,

114

115

ms,

116

us\&. To turn off any kind of rate limiting, set either value to 0\&.

117

.RE

118

.PP

119

\fISystemMaxUse=\fR, \fISystemKeepFree=\fR, \fISystemMaxFileSize=\fR, \fIRuntimeMaxUse=\fR, \fIRuntimeKeepFree=\fR, \fIRuntimeMaxFileSize=\fR

120

.RS 4

121

Enforce size limits on the journal files stored\&. The options prefixed with

122

System

123

apply to the journal files when stored on a persistent file system, more specifically

124

/var/log/journal\&. The options prefixed with

125

Runtime

126

apply to the journal files when stored on a volatile in\-memory file system, more specifically

127

/run/log/journal\&. The former is used only when

128

/var

129

is mounted, writable and the directory

130

/var/log/journal

131

exists\&. Otherwise only the latter applies\&. Note that this means that during early boot and if the administrator disabled persistent logging only the latter options apply, while the former apply if persistent logging is enabled and the system is fully booted up\&.

132

\fISystemMaxUse=\fR

133

and

134

\fIRuntimeMaxUse=\fR

135

control how much disk space the journal may use up at maximum\&. Defaults to 10% of the size of the respective file system\&.

136

\fISystemKeepFree=\fR

137

and

138

\fIRuntimeKeepFree=\fR

139

control how much disk space the journal shall always leave free for other uses if less than the disk space configured in

140

\fISystemMaxUse=\fR

141

and

142

\fIRuntimeMaxUse=\fR

143

is available\&. Defaults to 5% of the size of the respective file system\&.

144

\fISystemMaxFileSize=\fR

145

and

146

\fIRuntimeMaxFileSize=\fR

147

control how large individual journal files may grow at maximum\&. This influences the granularity in which disk space is made available through rotation, i\&.e\&. deletion of historic data\&. Defaults to one eighth of the values configured with

148

\fISystemMaxUse=\fR

149

and

150

\fIRuntimeMaxUse=\fR, so that usually seven rotated journal files are kept as history\&. Specify values in bytes or use K, M, G, T, P, E as units for the specified sizes\&. Note that size limits are enforced synchronously to journal files as they are extended, and need no explicit rotation step triggered by time\&.

151

.RE

152

.PP

153

\fIMaxFileSec=\fR

154

.RS 4

155

The maximum time to store entries in a single journal file, before rotating to the next one\&. Normally time\-based rotation should not be required as size\-based rotation with options such as

156

\fISystemMaxFileSize=\fR

157

should be sufficient to ensure that journal files don\*(Aqt grow without bounds\&. However, to ensure that not too much data is lost at once when old journal files are deleted it might make sense to change this value from the default of one month\&. Set to 0 to turn off this feature\&. This setting takes time values which may be suffixed with the units year, month, week, day, h, m to override the default time unit of seconds\&.

158

.RE

159

.PP

160

\fIMaxRetentionSec=\fR

161

.RS 4

162

The maximum time to store journal entries\&. This controls whether journal files containing entries older then the specified time span are deleted\&. Normally time\-based deletion of old journal files should not be required as size\-based deletion with options such as

163

\fISystemMaxUse=\fR

164

should be sufficient to ensure that journal files don\*(Aqt grow without bounds\&. However, to enforce data retention policies it might make sense to change this value from the default of 0 (which turns off this feature)\&. This setting also takes time values which may be suffixed with the units year, month, week, day, h, m to override the default time unit of seconds\&.

165

.RE

166

.PP

167

\fIForwardToSyslog=\fR, \fIForwardToKMsg=\fR, \fIForwardToConsole=\fR

168

.RS 4

169

Control whether log messages received by the journal daemon shall be forwarded to a traditional syslog daemon, to the kernel log buffer (kmsg), or to the system console\&. These options take boolean arguments\&. If forwarding to syslog is enabled but no syslog daemon is running the respective option has no effect\&. By default only forwarding to syslog is enabled\&. These settings may be overridden at boot time with the kernel command line options

170

systemd\&.journald\&.forward_to_syslog=,

171

systemd\&.journald\&.forward_to_kmsg=

172

and

173

systemd\&.journald\&.forward_to_console=\&.

174

.RE

175

.PP

176

\fIMaxLevelStore=\fR, \fIMaxLevelSyslog=\fR, \fIMaxLevelKMsg=\fR, \fIMaxLevelConsole=\fR

177

.RS 4

178

Controls the maximum log level of messages that are stored on disk, forwarded to syslog, kmsg or the console (if that is enabled, see above)\&. As argument, takes one of

179

emerg,

180

alert,

181

crit,

182

err,

183

warning,

184

notice,

185

info,

186

debug

187

or integer values in the range of 0\&.\&.7 (corresponding to the same levels)\&. Messages equal or below the log level specified are stored/forwarded, messages above are dropped\&. Defaults to

188

debug

189

for

190

\fIMaxLevelStore=\fR

191

and

192

\fIMaxLevelSyslog=\fR, to ensure that the all messages are written to disk and forwarded to syslog\&. Defaults to

193

notice

194

for

195

\fIMaxLevelKMsg=\fR

196

and

197

info

198

for

199

\fIMaxLevelConsole=\fR\&.

200

.RE

201

.PP

202

\fITTYPath=\fR

203

.RS 4

204

Change the console TTY to use if

205

\fIForwardToConsole=yes\fR

206

is used\&. Defaults to

207

/dev/console\&.

208

.RE

209

.SH "SEE ALSO"

210

.PP

211

212

\fBsystemd\fR(1),

213

\fBsystemd-journald.service\fR(8),

214

\fBjournalctl\fR(1),

215

\fBsystemd.journal-fields\fR(7),

216

\fBsystemd-system.conf\fR(5)

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