. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1724 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1726 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1728 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 987 12 Glossary and Index 991 12.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 992 12.2 Module Index . . . . . . . . . . . . . . re-use this file-handle for all subse- quent access to this file. CacheFile /usr/local/apache2/htdocs/index.html If you intend to cache a large number of files in this manner, you must ensure that your operating in-memory contents for all subsequent accesses to this file. MMapFile /usr/local/apache2/htdocs/index.html As with the CACHEFILE directive, any changes in these files will not be picked up by httpd after

. . . 987 12 Glossary and Index 991 12.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 992 12.2 Module Index . . . . . . . . . . . . . . re-use this file-handle for all subse- quent access to this file. CacheFile /usr/local/apache2/htdocs/index.html If you intend to cache a large number of files in this manner, you must ensure that your operating in-memory contents for all subsequent accesses to this file. MMapFile /usr/local/apache2/htdocs/index.html As with the CACHEFILE directive, any changes in these files will not be picked up by httpd after

. . . 771 12 Glossary and Index 775 12.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 776 12.2 Module Index . . . . . . . . . . . . . . specific HTTP header. What value will httpd set in the CustomHeaderName header for a request to /example/index.html ? 2.5. CONFIGURATION SECTIONS 31 Header set CustomHeaderName one index.html If you intend to cache a large number of files in this manner, you must ensure that your operating

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1810 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1812 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1814 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

x CONTENTS 12 Glossary and Index 1083 12.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1084 12.2 Module Index . . . . . . . . . . . . . . specific HTTP header. What value will httpd set in the CustomHeaderName header for a request to /example/index.html ? 2.5. CONFIGURATION SECTIONS 41 Header set CustomHeaderName one index.html If you intend to cache a large number of files in this manner, you must ensure that your operating

. . 1065 12 Glossary and Index 1069 12.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1070 12.2 Module Index . . . . . . . . . . . . . . specific HTTP header. What value will httpd set in the CustomHeaderName header for a request to /example/index.html ? 2.5. CONFIGURATION SECTIONS 41 Header set CustomHeaderName one index.html If you intend to cache a large number of files in this manner, you must ensure that your operating

de中采用map s3ChunkInfoMap用于保存对象存储的位置信息。采用2级索引的好处是，根据操作的offset可以快速定位到index，则只需要遍历index相关的S3ChunkInfoList，减少了遍历的范围。 对象名设计 对象名采用chunkId+blockindex+compaction（后台碎片整理才会使用，默认0）+inod ），对于小io进行block级别的预读。 即读写缓存相互没影响不相关， 缓存层级 缓存层级分为fs->file->chunk->datacache 4层，通过inodeId找到file，通过index找到chunk，然后通过offset~len找到是否有合适的datacache或者new datacache。 对外接口 流程上对于读写缓存有影响的接口包括：write，read，releas TYPE_FILE only map s3ChunkInfoMap = 14; // TYPE_S3 only, first is chunk index optional uint64 version = 15; } class ClientS3Adaptor { public: ClientS3Adaptor () {}

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 478 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 480 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

re-use this file-handle for all subsequent access to this file. CacheFile /usr/local/apache2/htdocs/index.html If you intend to cache a large number of files in this manner, you must ensure that your operating in-memory contents for all subsequent accesses to this file. MMapFile /usr/local/apache2/htdocs/index.html As with the CacheFile directive, any changes in these files will not be picked up by Apache types, or a combination. One way of selecting the most appropriate choice is to give the user an index page, and let them select. However it is often possible for the server to choose automatically. This