int dfs_file_write(struct dfs_fd fd, const void buf, size_t len) dfs层的write接口,调用具体文件系统的write接口实现写入功能 int dfs_file_flush(struct dfs_fd *fd) dfs层的同步接口,调用具体文件系统的flush接口实现文件的同步,既把文件句柄内的缓存数据真正写入到存储设备 int dfs_file_lse...
writeChunk由子类DFSOutputStream实现,如下: protectedsynchronizedvoidwriteChunk(byte[] b,intoffset,intlen,byte[] checksum)throwsIOException {//创建一个package,并写入数据currentPacket =newPacket(packetSize, chunksPerPacket,bytesCurBlock); currentPacket.writeChecksum(checksum,0, cklen); currentPacket.writeD...
rt_kprintf("Write string '%s' to /user/test.txt. ", str); /* Open the file in create and read-write mode, create the file if it does not exist*/ fd = open("/user/test.txt", O_WRONLY | O_CREAT); if (fd >= 0) { if(write(fd, str, sizeof(str)) == sizeof(str)) r...
4)生成 fileid描述: 选定存储目录之后storage会为文件生一个Fileid,由storage server ip、文件创建时间、文件大小、文件crc32和一个随机数拼接而成,然后将这个二进制串进行base64编码,转换为可打印的字符串。选择两级目录当选定存储目录之后,storage会为文件分配一个fileid,每个存储目录下有两级256*256的子目录,stor...
storage server count=1active server count=1storage server port=23000storage HTTP port=80store path count=1subdir count per path=256current write server index=0current trunk file id=0Storage1: id=192.168.65.132ip_addr=192.168.65.132(localhost.localdomain) ACTIVE ...
基于Google File System的思想,文件上传后不能修改。需要使用专有API对文件进行访问,也可称作分布式文件存储服务。 典型代表:MogileFS、FastDFS、TFS。 该类文件系统复杂性较低,不需要支持若干标准的文件操作,如:目录结构、文件读写权限、文件锁等,系统比较简洁。
Kertish-dos is a simple distributed object storage platform, implements object storage on a single distributed computer cluster, and provides interfaces for file/folder handling. Kertish-dos aims primarily for completely distributed operation without a single point of failure, scalable to the exabyte ...
proxy_temp_file_write_size 128k; #设置缓存存储路径、存储方式、分配内存大小、磁盘最大空间、缓存期限 proxy_cache_path /fastdfs/cache/nginx/proxy_cache levels=1:2 keys_zone=http-cache:200m max_size=1g inactive=30d; proxy_temp_path /fastdfs/cache/nginx/proxy_cache/tmp; ...
filePath = iter.path print('upload: '+filePath) # 二进制打开文件用于写入 path = os.path.dirname(self.root_path+filePath) if not os.path.exists(path): os.mkdir(path) with open(selfroot_path+filePath, 'wb') as f: f.write(iter.buffer) # 把文件广播其他数据服务器同步,保存...
storage_upload_file_done_callback等信息都封装到pTask,然后将它加入队列中。 然后dio线程中队列就能检测到新的任务,就会执行deal_func也就是dio_write_file,进行写入磁盘。 相关视频推荐 支撑亿级io的底层基石 epoll实战揭秘 6种epoll的做法,从redis,memcached到nginx的网络模型实现 ...