<commit_before>---
title: SLA for storage io bandwidth
category: sla
authors: <NAME>
wiki_category: SLA
wiki_title: Features/Design/SLA for storage io bandwidth
wiki_revision_count: 61
wiki_last_updated: 2013-06-28
---

# SLA for storage io bandwidth

## Introduction

This wiki page focuses on the design of storage resources Service Level Agreement(SLA). Existing iotune properties(quota) are applied on a vDisk of VM, and provides the ability to provide additional per-device I/O tuning. They include the following elements:

*   total_bytes_sec
    -   The optional total_bytes_sec element is the total throughput limit in bytes per second. This cannot appear with read_bytes_sec or write_bytes_sec.
*   read_bytes_sec<commit_msg>Introduction<commit_after>---
title: SLA for storage io bandwidth
category: sla
authors: <NAME>
wiki_category: SLA
wiki_title: Features/Design/SLA for storage io bandwidth
wiki_revision_count: 61
wiki_last_updated: 2013-06-28
---

# SLA for storage io bandwidth

## Introduction

This wiki page focuses on the design of storage I/O bandwidth Service Level Agreement(SLA). Existing iotune properties(quota) are applied on a vDisk of VM, and provides the ability to provide additional per-device I/O tuning. They include the following elements:

*   total_bytes_sec
    -   The optional total_bytes_sec element is the total throughput limit in bytes per second. This cannot appear with read_bytes_sec or write_bytes_sec.
*   read_bytes_sec
{'fraction_non_alphanumeric': 0.055064581917063225, 'fraction_numerical': 0.013596193065941536, 'mean_word_length': 4.818181818181818, 'pattern_counts': {'":': 0, '<': 5, '<?xml version=': 0, '>': 5, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '3946977', 'n_tokens_mistral': 435, 'n_tokens_neox': 405, 'n_words': 180}