iGen: A Realistic Request Generator for Cloud File Systems Benchmarking

Ren, Zhijie; Xu, Biao; Shi, Wei; Ren, Yongjian; Cao, Feng; Lin, Jiangbin; Zheng, Yi

doi:10.1109/cloud.2016.0053

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…where 𝐽 is the index set of all subpages in the 𝑖 𝑡ℎ block that have never been updated, 𝑡 𝑖 𝑗 means the access interval time of 𝑗 𝑡ℎ subpage in the 𝑖 𝑡ℎ block, and 𝑇 𝑖 represents the average access interval time in all subpages. Assuming that the number of updates associating with each subpage per unit time follows the Poisson distribution with the parameter of 1 𝑇 𝑖 [23], the access interval time of each subpage in the block will follow the exponential distribution with the parameter of 1 𝑇 𝑖 . That is to say, 1 − 𝑒…”

Section: Gc Target Blockmentioning

confidence: 99%

Intra-page Cache Update in SLC-mode with Partial Programming in High Density SSDs

Cai

et al. 2021

50th International Conference on Parallel Processing

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Modern high density SSDs commonly designate a part of their capacity as a cache using an Single-level Cell (SLC)-mode region. Partial programming is then adopted for reducing space fragmentation in the SLC-mode pages, but it exacerbates program disturb including both in-page disturb and neighbouring page disturb. This paper proposes a partial programming scheme (called intra-page update) by updating hot, small size data inside a given page to minimize the negative impact induced by program disturb. Moreover, we introduce a novel data movement principle to separate hot and cold write data in the SLC-mode cache when updating the data or carrying out garbage collection. As a result, the hot updated data can be kept in the SLC-mode cache and the cold data will be flushed onto the high density SSD region. Simulation tests on several realistic disk traces show that our proposal improves bit error rate by 9.2%, and I/O performance by 9.3% on average, compared to state-of-the-art methods, without a noticeable decrease in total endurance.

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Section: Gc Target Blockmentioning

confidence: 99%

Intra-page Cache Update in SLC-mode with Partial Programming in High Density SSDs

Cai

et al. 2021

50th International Conference on Parallel Processing

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“…Arrival rate model for a key. To approximate the ideal lease duration, we need a model of the arrival rate of accesses (read and write) for key K. We use a Poisson process to model independent requests for K. Poisson is a standard stochastic process for independent arrivals, and is used in popular key-value storage benchmarks (e.g., YCSB [8], Retwis [22], TPC-C [26]) [7,38,39,43]. In these benchmarks, each client processes transaction arrivals at a configured transaction arrival rate (λ).…”

Section: Ideal Lease Duration For a Keymentioning

confidence: 99%

Lightweight Inter-transaction Caching with Precise Clocks and Dynamic Self-invalidation

Misra,

Radhakrishnan,

Chase

et al. 2020

Preprint

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Distributed, transactional storage systems scale by sharding data across servers. However, workload-induced hotspots result in contention, leading to higher abort rates and performance degradation.We present KAIROS, a transactional key-value storage system that leverages client-side inter-transaction caching and sharded transaction validation to balance the dynamic load and alleviate workload-induced hotspots in the system. KAIROS utilizes precise synchronized clocks to implement self-invalidating leases for cache consistency and avoids the overhead and potential hotspots due to maintaining sharing lists or sending invalidations.Experiments show that inter-transaction caching alone provides 2.35x the throughput of a baseline system with only intra-transaction caching; adding sharded validation further improves the throughput by a factor of 3.1 over baseline. We also show that lease-based caching can operate at a 30% higher scale while providing 1.46x the throughput of the state-of-the-art explicit invalidationbased caching.

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Cache eviction for SSD-HDD hybrid storage based on sequential packing

Tang

Sha

et al. 2023

Journal of Systems Architecture

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iGen: A Realistic Request Generator for Cloud File Systems Benchmarking

Cited by 7 publications

References 22 publications

Intra-page Cache Update in SLC-mode with Partial Programming in High Density SSDs

Intra-page Cache Update in SLC-mode with Partial Programming in High Density SSDs

Lightweight Inter-transaction Caching with Precise Clocks and Dynamic Self-invalidation

Cache eviction for SSD-HDD hybrid storage based on sequential packing

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