Hello, Igniters.
For now, we have dozens of the `IgniteSystemProperties` [1] that can tweak
Ignite behaviour in the very wide limits.
But, the issue, for the administrator is the following
- Documentation about existing properties can be outdated.
- The only place of the truth is the source code.
- It’s hard to understand what flag is supported in what version.
I propose to implement output of all available properties with it’s
descriptions in the `ignite.sh -X` command.
Example of the JVM output:
```
[16:25:49]~/src/ignite:[master]$ java -X
-Xbatch disable background compilation
-Xbootclasspath/a:<directories and zip/jar files separated by :>
append to end of bootstrap class path
-Xcheck:jni perform additional checks for JNI functions
-Xcomp forces compilation of methods on first invocation
-Xdebug provided for backward compatibility
-Xdiag show additional diagnostic messages
-Xfuture enable strictest checks, anticipating future default
-Xint interpreted mode execution only
-Xinternalversion
displays more detailed JVM version information than the
[16:28:45]~/src/ignite:[master]$ java -XX:+UnlockDiagnosticVMOptions
-XX:+PrintFlagsFinal -version
[Global flags]
ccstrlist AOTLibrary =
{product} {default}
bool AbortVMOnCompilationFailure = false
{diagnostic} {default}
ccstr AbortVMOnException =
{diagnostic} {default}
ccstr AbortVMOnExceptionMessage =
{diagnostic} {default}
bool AbortVMOnSafepointTimeout = false
{diagnostic} {default}
bool AbortVMOnVMOperationTimeout = false
{diagnostic} {default}
intx AbortVMOnVMOperationTimeoutDelay = 1000
{diagnostic} {default}
int ActiveProcessorCount = -1
{product} {default}
```
Example of the Ignite output:
````
> ignite.sh -X
IGNITE_CONFIG_URL
- System property to hold optional configuration URL.
IGNITE_SSH_HOST -
System property to hold SSH host for visor-started nodes.
IGNITE_MIN_BUFFERED_COMMUNICATION_MSG_CNT - [DEPRECATED] System
property to disable buffered communication if node sends less messages count
than specified by this property. Default value is {@code 512}.
…
```
WDYT?
[1]
https://github.com/apache/ignite/blob/master/modules/core/src/main/java/org/apache/ignite/IgniteSystemProperties.java#L56
