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MXS-827: Add connection keepalive

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The readwritesplit now sends COM_PING queries to backend servers that have
been idle for too long. The option is configured with the
`connection_keepalive` parameter.
This commit is contained in:
Markus Mäkelä
2017-03-24 05:22:25 +02:00
parent e3bae59e1a
commit 710012ac5d
10 changed files with 125 additions and 14 deletions
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4
include/maxscale/buffer.h
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@ -58,7 +58,8 @@ typedef enum
GWBUF_TYPE_SESCMD_RESPONSE = 0x08,
GWBUF_TYPE_RESPONSE_END = 0x10,
GWBUF_TYPE_SESCMD = 0x20,
GWBUF_TYPE_HTTP = 0x40
GWBUF_TYPE_HTTP = 0x40,
GWBUF_TYPE_IGNORABLE = 0x80
} gwbuf_type_t;
#define GWBUF_IS_TYPE_UNDEFINED(b) (b->gwbuf_type == 0)
@ -68,6 +69,7 @@ typedef enum
#define GWBUF_IS_TYPE_SESCMD_RESPONSE(b) (b->gwbuf_type & GWBUF_TYPE_SESCMD_RESPONSE)
#define GWBUF_IS_TYPE_RESPONSE_END(b) (b->gwbuf_type & GWBUF_TYPE_RESPONSE_END)
#define GWBUF_IS_TYPE_SESCMD(b) (b->gwbuf_type & GWBUF_TYPE_SESCMD)
#define GWBUF_IS_IGNORABLE(b) (b->gwbuf_type & GWBUF_TYPE_IGNORABLE)
/**
* A structure to encapsulate the data in a form that the data itself can be