ECI-Cache

Ahmadian, Saba; Mutlu, Onur; Asadi, Hossein

doi:10.1145/3179412

Cited by 9 publications

(14 citation statements)

References 36 publications

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“…S-CAVE [10], vCacheShare [9], Centaur [11], and ECI-Cache [6] are the most state-of-the-art hypervisor-based I/O caching schemes in virtualized platforms. Such schemes employ a single level of SSD cache and mainly focus on dynamic and efficient cache space partitioning between running VMs.…”

Section: I/o Caching In Virtualized Platformsmentioning

confidence: 99%

“…To preserve the reliability of write requests, the write policy of the SSD cache is set to Write Through (WT). Such cache size estimation (based on WSS) is deprecated and fails to accurately estimate the cache space needed for workloads with sequential access patterns [6]. vCacheShare [9] estimates the cache size of the VMs based on locality and reuse intensity (i.e., workloads' burstiness).…”

Section: I/o Caching In Virtualized Platformsmentioning

confidence: 99%

“…To alleviate the performance shortcomings of such HDDbased storage systems, enterprise manufacturers, such as Dell EMC, HP, and NetApp [3], [4], [5], and various research works on emerging storage architectures, such as [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], propose I/O caching schemes that accelerate the response 1. Due to the degraded mode of Redundant Array of Independent Disks (RAID) [31] during the rebuild process in SSDs.…”

Section: Introductionmentioning

confidence: 99%

“…• We implement the proposed two-level I/O cache in a real system and evaluate the performance and endurance of our scheme by performing extensive experiments with more than 10 VMs running real application workloads on an open-source hypervisor, QEMU [56]. • We find ETICA to provide higher performance, higher efficiency, and higher endurance than the state-of-the art I/O caching schemes for virtualized platforms [6].…”

Section: Introductionmentioning

confidence: 99%

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ETICA: Efficient Two-Level I/O Caching Architecture for Virtualized Platforms

Ahmadian

Salkhordeh

Mutlu

et al. 2021

IEEE Trans. Parallel Distrib. Syst.

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In recent years, increased I/O demand of Virtual Machines (VMs) in large-scale data centers and cloud computing has encouraged system architects to design high-performance storage systems. One common approach to improving performance is to employ fast storage devices such as Solid-State Drives (SSDs) as an I/O caching layer for slower storage devices. SSDs provide high performance, especially on random requests, but they also have limited endurance: they support only a limited number of write operations and can therefore wear out relatively fast due to write operations. In addition to the write requests generated by the applications, each read miss in the SSD cache is served at the cost of imposing a write operation to the SSD (to copy the data block into the cache), resulting in an even larger number of writes into the SSD. Previous I/O caching schemes on virtualized platforms only partially mitigate the endurance limitations of SSD-based I/O caches; they mainly focus on assigning efficient cache write policies and cache space to the VMs. Moreover, existing cache space allocation schemes have inefficiencies: they do not take into account the impact of cache write policy in reuse distance calculation of the running workloads and hence, reserve cache blocks for accesses that would not be served by cache.In this paper, we propose an Efficient Two-Level I/O Caching Architecture (ETICA) for virtualized platforms that can significantly improve I/O latency, endurance, and cost (in terms of cache size) while preserving the reliability of write-pending data blocks. As opposed to previous one-level I/O caching schemes in virtualized platforms, our proposed architecture 1) provides two levels of cache by employing both Dynamic Random-Access Memory (DRAM) and SSD in the I/O caching layer of virtualized platforms and 2) effectively partitions the cache space between running VMs to achieve maximum performance and minimum cache size. To manage the two-level cache, unlike the previous reuse distance calculation schemes such as Useful Reuse Distance (URD), which only consider the request type and neglect the impact of cache write policy, we propose a new metric, Policy Optimized reuse Distance (POD). The key idea of POD is to effectively calculate the reuse distance and estimate the amount of two-level DRAM+SSD cache space to allocate by considering both 1) the request type and 2) the cache write policy. Doing so results in enhanced performance and reduced cache size due to the allocation of cache blocks only for the requests that would be served by the I/O cache. ETICA maintains the reliability of write-pending data blocks and improves performance by 1) assigning an effective and fixed write policy at each level of the I/O cache hierarchy and 2) employing effective promotion and eviction methods between cache levels. Our extensive experiments conducted with a real implementation of the proposed two-level storage caching architecture show that ETICA provides 45% higher performance, compared to the state-of-the-art caching scheme...

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Section: I/o Caching In Virtualized Platformsmentioning

confidence: 99%

Section: I/o Caching In Virtualized Platformsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

ETICA: Efficient Two-Level I/O Caching Architecture for Virtualized Platforms

Ahmadian

Salkhordeh

Mutlu

et al. 2021

IEEE Trans. Parallel Distrib. Syst.

Self Cite

View full text Add to dashboard Cite

show abstract

“…ECI-Cache is a scheme for dividing cache resources for virtualization platforms [4]. It mainly uses reuse distance as the basis for division, and also considers the type of cache request, and defines the reuse distance in a specific request mode as the effective reuse distance.…”

Section: Dynamic Cache Allocation Scheme Based On Localitymentioning

confidence: 99%