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Child -> Parent pipe for COW info transferring.

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This commit is contained in:
antirez
2016-09-19 13:45:20 +02:00
parent e1eccf9a6b
commit e565632e59
6 changed files with 132 additions and 3 deletions
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19
src/server.h
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@ -806,6 +806,10 @@ struct clusterState;
#undef hz
#endif
#define CHILD_INFO_MAGIC 0xC17DDA7A12345678LL
#define CHILD_INFO_TYPE_RDB 0
#define CHILD_INFO_TYPE_AOF 1
struct redisServer {
/* General */
pid_t pid; /* Main process pid. */
@ -884,6 +888,8 @@ struct redisServer {
size_t resident_set_size; /* RSS sampled in serverCron(). */
long long stat_net_input_bytes; /* Bytes read from network. */
long long stat_net_output_bytes; /* Bytes written to network. */
size_t stat_rdb_cow_bytes; /* Copy on write bytes during RDB saving. */
size_t stat_aof_cow_bytes; /* Copy on write bytes during AOF rewrite. */
/* The following two are used to track instantaneous metrics, like
* number of operations per second, network traffic. */
struct {
@ -958,6 +964,13 @@ struct redisServer {
int stop_writes_on_bgsave_err; /* Don't allow writes if can't BGSAVE */
int rdb_pipe_write_result_to_parent; /* RDB pipes used to return the state */
int rdb_pipe_read_result_from_child; /* of each slave in diskless SYNC. */
/* Pipe and data structures for child -> parent info sharing. */
int child_info_pipe[2]; /* Pipe used to write the child_info_data. */
struct {
int process_type; /* AOF or RDB child? */
size_t cow_size; /* Copy on write size. */
unsigned long long magic; /* Magic value to make sure data is valid. */
} child_info_data;
/* Propagation of commands in AOF / replication */
redisOpArray also_propagate; /* Additional command to propagate. */
/* Logging */
@ -1411,6 +1424,12 @@ void aofRewriteBufferReset(void);
unsigned long aofRewriteBufferSize(void);
ssize_t aofReadDiffFromParent(void);
/* Child info */
void openChildInfoPipe(void);
void closeChildInfoPipe(void);
void sendChildInfo(int process_type);
void receiveChildInfo(void);
/* Sorted sets data type */
/* Input flags. */