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ceph rbd:cache

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以aio_write为例,给出librbd cache相关的调用顺序:

注意,下文用 -> 表示实例函数 ,::表示静态函数。

  • Image->aio_write
    • ImageRequestWQ->aio_write
      • ImageRequest::aio_write
        • ImageRequest->send
          • if (m_bypass_image_cache || m_image_ctx.image_cache==nullptr)
            • AbstractImageWriteRequest->send_request
          • else
            • ImageWriteRequest->send_image_cache_request
              • PassthroughImageCache->aio_write
                • ImageWriteback->aio_write
                  • ImageWriteRequest->set_bypass_image_cache
                  • ImageWriteRequest->send
                    • AbstractImageWriteRequest->send_request
                      * if (image_ctx.object_cacher == nullptr)
                      * AbstractImageWriteRequest->send_object_requests
                      * else
                      * ImageWriteRequest->send_object_cache_requests
                      * ImageCtx->write_to_cache

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