Storage in multi-queue storage devices using queue multiplexing and access control
A method for data storage includes, in a system that includes multiple servers, multiple multi-queue storage devices and at least one storage controller that communicate over a network, running, in a server among the servers, multiple data-path instances (DPs) that operate independently of one another and issue storage commands for execution in the multi-queue storage devices. The storage commands, issued by the multiple DPs running in the server, are multiplexed using an Input-Output Multiplexer (I/O MUX) process. The multiplexed storage commands are executed in the multi-queue storage devices.
1. A method for data storage, comprising:
in a system that comprises multiple servers, multiple multi-queue storage devices and at least one storage controller that communicate over a network, running, in a server among the servers, multiple data-path instances (DPs) that operate independently of one another and issue storage commands for execution in the multi-queue storage devices;
using an Input-Output Multiplexer (I/O MUX) process, multiplexing the storage commands issued by the multiple DPs running in the server; and
executing the multiplexed storage commands in the multi-queue storage devices, including, in a given multi-queue storage device, queuing the storage commands issued by the multiple DPs running in the server in a single queue pair (QP) associated with the I/O MUX process.
2. The method according to claim 1 , wherein multiplexing the storage commands comprises running the I/O MUX process in the server.
3. The method according to claim 1 , wherein multiplexing the storage commands comprises running the I/O MUX process in a gateway separate from the server.
4. The method according to claim 3 , further comprising running in the gateway an access-control process that enforces an access-control policy on the storage commands.
5. The method according to claim 1 , wherein multiplexing and executing the storage commands comprises accessing the multi-queue storage devices using remote direct memory access, without running code on the at least one storage controller.
6. A computing system, comprising:
multiple multi-queue storage devices;
at least one storage controller;
multiple servers, wherein a server among the servers is configured to run multiple data-path instances (DPs) that operate independently of one another and issue storage commands for execution in the multi-queue storage devices; and
a processor configured to multiplex the storage commands issued by the multiple DPs running in the server using an Input-Output Multiplexer (I/O MUX) process, so as to execute the multiplexed storage commands in the multi-queue storage devices,
wherein a given multi-queue storage device is configured to queue the storage commands issued by the multiple DPs running in the server in a single queue pair (QP) associated with the I/O MUX process.
7. The system according to claim 6 , wherein the processor, which is configured to multiplex the storage commands, is a processor in the server.
8. The system according to claim 6 , wherein the processor, which is configured to multiplex the storage commands, is a processor in a gateway separate from the server.
9. The system according to claim 8 , wherein the processor in the gateway is further configured to run an access-control process that enforces an access-control policy on the storage commands.
10. The system according to claim 6 , wherein the server and the processor are configured to multiplex and execute the storage commands by accessing the multi-queue storage devices using remote direct memory access, without running code on the at least one storage controller.