# US 10,313,769 B2 · Technologies for performing partially synchronized writes

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- Number: US 10,313,769 B2
- Document ID: US10313769B2
- Status: Granted
- Kind: B2
- Application number: 15/396,284
- Filed: 2016-12-30
- Published: 2018-01-25
- Granted: 2019-06-04
- Earliest claimed: 2016-07-22
- Assignees: Intel Corporation
- Applicants: Intel Corporation
- Inventors: Steven C. Miller
- Web page: https://patentgrep.com/patent/US10313769B2

## CPC

- G06F 3/061: {Improving I/O performance}
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- H04L 12/2809: {indicating that an appliance service is present in a home automation network (monitoring functionality H04L43/0817; discovery or management thereof, e.g. service location protocol [SLP] or web services, H04L67/51)}
- H04L 41/024: {using relational databases for representation of network management data, e.g. managing via structured query language [SQL]}
- H04L 41/046: comprising network management agents or mobile agents therefor
- H04L 41/0813: characterised by the conditions triggering a change of settings
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- H04L 67/51: Discovery or management thereof, e.g. service location protocol [SLP] or web services
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- H05K 1/181: associated with surface mounted components
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- H05K 7/1418: {Card guides, e.g. grooves (H05K7/1425 takes precedence)}
- H05K 7/1421: {Drawers for printed circuit boards}
- H05K 7/1422: {Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames}
- H05K 7/1447: {External wirings; Wiring ducts; Laying cables}
- H05K 7/1461: {Slidable card holders; Card stiffeners; Control or display means therefor}
- H05K 7/1485: {Servers; Data center rooms, e.g. 19-inch computer racks}
- H05K 7/1487: {Blade assemblies, e.g. blade cases or inner arrangements within a blade}
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- H05K 7/1491: {having cable management arrangements (management of optical cables G02B6/444; in telecommunication cabinets H04Q1/06)}
- H05K 7/1492: {having electrical distribution arrangements, e.g. power supply or data communications}
- H05K 7/1498: {Resource management, Optimisation arrangements, e.g. configuration, identification, tracking, physical location (thermal management H05K7/20836)}
- H05K 7/2039: {characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00)}
- H05K 7/20709: {for server racks or cabinets; for data centers, e.g. 19-inch computer racks}
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## Abstract

Technologies for managing partially synchronized writes include a managed node. The managed node is to issue a write request to write a data block, on behalf of a workload, to multiple data storage devices connected to a network, pause execution of the workload, receive an initial acknowledgment associated with one of the multiple data storage devices, wherein the initial acknowledgement is indicative of successful storage of the data block, and resume execution of the workload after receipt of the initial acknowledgement and before receipt of subsequent acknowledgements associated with any of the other data storage devices. Other embodiments are also described and claimed.

## Claims

### Claim 1

A managed node to manage partially synchronized writes, the managed node comprising:
a network communicator to issue a write request to write a data block, on behalf of a workload, to multiple data storage devices connected to a network; and
a data manager to pause execution of the workload;
wherein the network communicator is further to receive an initial acknowledgment associated with one of the multiple data storage devices, wherein the initial acknowledgement is indicative of successful storage of the data block;
the data manager is further to resume execution of the workload after receipt of the initial acknowledgement and before receipt of subsequent acknowledgements associated with any other data storage devices of the multiple data storage devices;
the network communicator is further to receive a subsequent acknowledgement associated with one of the other data storage devices after the workload has been resumed; and
the data manager is further to determine an elapsed time period between the initial acknowledgement and the subsequent acknowledgement.

### Claim 2 (depends on 1)

The managed node of claim 1, wherein:
the data manager is further to determine whether the elapsed time period satisfies a predefined threshold time period; and
the network communicator is further to send, in response to a determination that the elapsed time period does not satisfy the predefined threshold time period, a request to at least one network device to increase a priority of write requests relative to other network traffic.

### Claim 3 (depends on 2)

The managed node of claim 2, wherein the data manager is further to:
receive an assignment of the workload from an orchestrator server; and
receive, with the assignment, an indication of the predefined threshold time period.

### Claim 4 (depends on 1)

The managed node of claim 1, wherein the data manager is further to:
determine whether the elapsed time period satisfies a predefined threshold time period; and
determine to await at least two acknowledgements in response to future write requests before resumption of the workload.

### Claim 5 (depends on 1)

The managed node of claim 1, wherein the data manager is further to:
receive an assignment of the workload from an orchestrator server;
receive, with the assignment, an indication of whether to enable partially synchronized writes; and
wherein to resume execution of the workload comprises to:
determine whether the assignment indicates to enable partially synchronized writes; and
resume execution in response to a determination that the assignment indicates to enable partially synchronized writes.

### Claim 6 (depends on 1)

The managed node of claim 1, wherein to issue the write request to multiple data storage devices comprises to issue the write request to multiple data storage devices in different failure domains.

### Claim 7 (depends on 1)

The managed node of claim 1, wherein to issue the write request to write a data block comprises to send a key associated with the data block, wherein the key uniquely identifies the data block.

### Claim 8 (depends on 1)

The managed node of claim 1, wherein to issue the write request to multiple storage devices comprises to issue the write request to one or more data storage devices of a different managed node.

### Claim 9 (depends on 1)

The managed node of claim 1, wherein to resume execution of the workload comprises to:
determine a number of partially synchronized write requests that have been issued, wherein each partially synchronized write request is a write request for which only one acknowledgement has been received;
determine whether the number of partially synchronized write requests satisfies a threshold number of allowable partially synchronized write requests; and
resume, in response to a determination that the number of partially synchronized write requests satisfies the threshold number, execution of the workload.

### Claim 10 (depends on 9)

The managed node of claim 9, wherein the data manager is further to receive an indication of the threshold number from an orchestrator server.

### Claim 11

One or more non-transitory computer-readable storage media comprising a plurality of instructions that, when executed by a managed node, cause the managed node to:
issue a write request to write a data block, on behalf of a workload, to multiple data storage devices connected to a network;
pause execution of the workload;
receive an initial acknowledgment associated with one of the multiple data storage devices, wherein the initial acknowledgement is indicative of successful storage of the data block;
resume execution of the workload after receipt of the initial acknowledgement and before receipt of subsequent acknowledgements associated with any other data storage devices of the multiple data storage devices;
receive a subsequent acknowledgement associated with one of the other data storage devices after the workload has been resumed; and
determine an elapsed time period between the initial acknowledgement and the subsequent acknowledgement.

### Claim 12 (depends on 11)

The one or more non-transitory computer-readable storage media of claim 11, wherein the plurality of instructions, when executed, cause the managed node to:
determine whether the elapsed time period satisfies a predefined threshold time period; and
send, in response to a determination that the elapsed time period does not satisfy the predefined threshold time period, a request to at least one network device to increase a priority of write requests relative to other network traffic.

### Claim 13 (depends on 12)

The one or more non-transitory computer-readable storage media of claim 12, wherein the plurality of instructions, when executed, cause the managed node to:
receive an assignment of the workload from an orchestrator server; and
receive with the assignment, an indication of the predefined threshold time period.

### Claim 14 (depends on 11)

The one or more non-transitory computer-readable storage media of claim 11, wherein the plurality of instructions, when executed, cause the managed node to:
determine whether the elapsed time period satisfies a predefined threshold time period; and
determine to await at least two acknowledgements in response to future write requests before resumption of the workload.

### Claim 15 (depends on 11)

The one or more non-transitory computer-readable storage media of claim 11, wherein the plurality of instructions, when executed, cause the managed node to:
receive an assignment of the workload from an orchestrator server;
receive with the assignment, an indication of whether to enable partially synchronized writes; and
wherein to resume execution of the workload comprises to:
determine whether the assignment indicates to enable partially synchronized writes; and
resume execution in response to a determination that the assignment indicates to enable partially synchronized writes.

### Claim 16 (depends on 11)

The one or more non-transitory computer-readable storage media of claim 11, wherein to issue the write request to multiple data storage devices comprises to issue the write request to multiple data storage devices in different failure domains.

### Claim 17 (depends on 11)

The one or more non-transitory computer-readable storage media of claim 11, wherein to issue the write request to write a data block comprises to send a key associated with the data block, wherein the key uniquely identifies the data block.

### Claim 18 (depends on 11)

The one or more non-transitory computer-readable storage media of claim 11, wherein to issue the write request to multiple storage devices comprises to issue the write request to one or more data storage devices of a different managed node.

### Claim 19 (depends on 11)

The one or more non-transitory computer-readable storage media of claim 11, wherein to resume execution of the workload comprises to:
determine a number of partially synchronized write requests that have been issued, wherein each partially synchronized write request is a write request for which only one acknowledgement has been received;
determine whether the number of partially synchronized write requests satisfies a threshold number of allowable partially synchronized write requests; and
resume, in response to a determination that the number of partially synchronized write requests satisfies the threshold number, execution of the workload.

### Claim 20

A method for managing partially synchronized writes, the method comprising:
issuing, by a managed node, a write request to write a data block, on behalf of a workload, to multiple data storage devices connected to a network;
pausing, by the managed node, execution of the workload;
receiving, by the managed node, an initial acknowledgment associated with one of the multiple data storage devices, wherein the initial acknowledgement is indicative of successful storage of the data block;
resuming, by the managed node, execution of the workload after receipt of the initial acknowledgement and before receipt of subsequent acknowledgements associated with any other data storage devices of the multiple data storage devices;
receiving, by the managed node, a subsequent acknowledgement associated with one of the other data storage devices after the workload has been resumed; and
determining, by the managed node, an elapsed time period between the initial acknowledgement and the subsequent acknowledgement.

### Claim 21 (depends on 20)

The method of claim 20, further comprising:
determining, by the managed node, whether the elapsed time period satisfies a predefined threshold time period; and
sending, by the managed node and in response to a determination that the elapsed time period does not satisfy the predefined threshold time period, a request to at least one network device to increase a priority of write requests relative to other network traffic.

### Claim 22 (depends on 21)

The method of claim 21, further comprising:
receiving, by the managed node, an assignment of the workload from an orchestrator server; and
receiving, by the managed node, with the assignment, an indication of the predefined threshold time period.