intfd=open("file.txt",O_RDWR); 1. 这里的"file.txt"是文件路径,O_RDWR表示以可读写的方式打开文件。你可以根据实际需求设置其他打开方式。 第二步:设置同步范围 使用sync_file_range函数设置需要同步到磁盘的文件范围。该函数的原型如下: intsync_file_range(intfd,off64_toffset,off64_tnbytes,unsignedint...
由于fsync与fdatasync(当写入文件长度发生变化时)系统调用都会更新元数据信息,而对于RDB这种连续性的写入数据场景,这期间可以不用频繁更新元数据信息,所以可以使用sync_file_range系统调用只将数据脏页只写入到文件区中。 总之,使用sync_file_rang系统调用在连续写入场景下,理论上可以有1-2倍间的写入性能提升。 该函数...
Can include any of the following values: EIO_SYNC_FILE_RANGE_WAIT_BEFORE, EIO_SYNC_FILE_RANGE_WRITE, EIO_SYNC_FILE_RANGE_WAIT_AFTER. These flags have the same meaning as their SYNC_FILE_RANGE_* counterparts(see SYNC_FILE_RANGE(2) man page). pri 请求的优先级:EIO_PRI_DEFAULT,EIO_PRI...
eio_sync_file_range (PECL eio >= 0.0.1dev) eio_sync_file_range — Sync a file segment with disk Description 代码语言:javascript 复制 resourceeio_sync_file_range(mixed $fd,int $offset,int $nbytes,int $flags[,int $pri=EIO_PRI_DEFAULT[,callable $callback=NULL[,mixed $data=NULL]]])...
fs/sync.c Original file line numberDiff line numberDiff line change @@ -292,8 +292,14 @@ int sync_file_range(struct file *file, loff_t offset, loff_t nbytes, } if (flags & SYNC_FILE_RANGE_WRITE) { int sync_mode = WB_SYNC_NONE; if ((flags & SYNC_FILE_RANGE_WRITE_AND_WAIT...
Given this is two years old it would be nice ifsync_file_range(2)were just stubbed to do nothing. Fine, it can't be implemented right now forreasons. MongoDB probably won't pass an ACID test with this stubbed. I get that. But anyone using WSL as their MongoDBdeploymentenvironment ...
[5.4] The arguments of sync_file_range() are operated incorrectly. The function sync_file_range() syscall and was compiled as x86 arch but it failed with "error num: 22, error message: Invalid argument" on a x86_64 system.Environment Red Hat Enterprise Linux 5 Update 4 x86_64 2.6.18...
也可以man sync_file_range下他的具体作用, 但是请注意,sync_file_range是不可移植的。 sync_file_range – sync a file segment with disk sync_file_range() permits fine control when synchronising the open file referred to by the file descriptor fd with disk. ...
{returnsys_sync_file_range(fd, ((loff_t)offset_hi <<32) | offset_lo, ((loff_t)nbytes_hi <<32) | nbytes_lo, flags); } 开发者ID:mikuhatsune001,项目名称:linux2.6.32,代码行数:8,代码来源:compat.c 示例4: sys_sync_file_range_metag ...
Check out the article on sync_file_range(): --- long sync_file_range(int fd, loff_t offset, loff_t nbytes, int flags); This call will synchronize a file's data to disk, starting at the given offset and proceeding for nbytes bytes (or to the end of the file if nbytes is zero)...