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B1ls by Microsoft Azure

B1ls is a BS family [Low Memory] [Premium Storage capable] [Intel processor] 1 vCPU server offered by Microsoft Azure with 1 vCPUs, 0.5 GiB of memory and 4 GB of storage. The pricing starts at 0.0052 USD per hour.
1 vCPU
0.5 GiB Memory
4 GB Storage
Spare SCore
1332
(All-cores)
1332
(Single-core)

Specifications

Server Metadata

Vendor ID
azure
Server ID
Standard_B1ls
Name
B1ls
API Reference
Standard_B1ls
Description
BS family [Low Memory] [Premium Storage capable] [Intel processor] 1 vCPU
Family
BS
Hw Virt
Status
active
Observed At
2026-07-30T23:06:23.171352

Availability

REGION / IDSPOTONDEMAND
East US (US) / eastus
- 0.0052 USD/h
East US 2 (US) / eastus2
- 0.0052 USD/h
North Central US (US) / northcentralus
- 0.0052 USD/h
West US 2 (US) / westus2
- 0.0052 USD/h
West US 3 (US) / westus3
- 0.0052 USD/h
Sweden Central (SE) / swedencentral
- 0.0054 USD/h
Central India (IN) / centralindia
- 0.0056 USD/h
Jio India Central (IN) / jioindiacentral
- 0.0056 USD/h
Jio India West (IN) / jioindiawest
- 0.0056 USD/h
Mexico Central (ZA) / mexicocentral
- 0.0057 USD/h
North Europe (IE) / northeurope
- 0.0057 USD/h
Spain Central (ES) / spaincentral
- 0.0057 USD/h
Canada Central (CA) / canadacentral
- 0.0058 USD/h
Canada East (CA) / canadaeast
- 0.0058 USD/h
France Central (FR) / francecentral
- 0.0059 USD/h
Indonesia Central (ID) / indonesiacentral
- 0.0059 USD/h
Malaysia West (MY) / malaysiawest
- 0.0059 USD/h
UK South (GB) / uksouth
- 0.0059 USD/h
UK West (GB) / ukwest
- 0.0059 USD/h
Austria East (AT) / austriaeast
- 0.006 USD/h
Belgium Central (BE) / belgiumcentral
- 0.006 USD/h
Germany West Central (DE) / germanywestcentral
- 0.006 USD/h
Israel Central (IL) / israelcentral
- 0.006 USD/h
Italy North (IT) / italynorth
- 0.006 USD/h
Poland Central (PL) / polandcentral
- 0.006 USD/h
West Europe (NL) / westeurope
- 0.006 USD/h
Central US (US) / centralus
- 0.0062 USD/h
South Central US (US) / southcentralus
- 0.0062 USD/h
UAE North (AE) / uaenorth
- 0.0062 USD/h
West Central US (US) / westcentralus
- 0.0062 USD/h
West US (US) / westus
- 0.0062 USD/h
Qatar Central (QA) / qatarcentral
- 0.0063 USD/h
Korea Central (KR) / koreacentral
- 0.0065 USD/h
Australia Central (AU) / australiacentral
- 0.0066 USD/h
Australia Central 2 (AU) / australiacentral2
- 0.0066 USD/h
Australia East (AU) / australiaeast
- 0.0066 USD/h
Australia Southeast (AU) / australiasoutheast
- 0.0066 USD/h
Norway East (NO) / norwayeast
- 0.0066 USD/h
Southeast Asia (SG) / southeastasia
- 0.0066 USD/h
Switzerland North (CH) / switzerlandnorth
- 0.0066 USD/h
Japan East (JP) / japaneast
- 0.0068 USD/h
South Africa North (ZA) / southafricanorth
- 0.0068 USD/h
New Zealand North (NZ) / newzealandnorth
- 0.0069 USD/h
Korea South (KR) / koreasouth
- 0.007 USD/h
Chile Central (CL) / chilecentral
- 0.0073 USD/h
East Asia (HK) / eastasia
- 0.0073 USD/h
Japan West (JP) / japanwest
- 0.0075 USD/h
Germany North (DE) / germanynorth
- 0.0078 USD/h
South India (IN) / southindia
- 0.0078 USD/h
UAE Central (AE) / uaecentral
- 0.0078 USD/h
West India (IN) / westindia
- 0.0078 USD/h
Brazil South (BR) / brazilsouth
- 0.0084 USD/h
France South (FR) / francesouth
- 0.0084 USD/h
South Africa West (ZA) / southafricawest
- 0.0085 USD/h
Norway West (NO) / norwaywest
- 0.0086 USD/h
Switzerland West (CH) / switzerlandwest
- 0.0086 USD/h
Brazil Southeast (US) / brazilsoutheast
- 0.0109 USD/h

Processor

vCPUs
1
Hypervisor
Microsoft Hyper-V
CPU Allocation
Burstable
CPU Cores
1
CPU Speed
2.8 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8370C
CPU L1D Cache
48 KiB
CPU L1D Cache Total
48 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
32 KiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
1 MiB
CPU L3 Cache
48 MiB
CPU L3 Cache Total
48 MiB
CPU Flags
fpu, vme, de, pse, tsc, msr, pae, mce, cx8, apic, sep, mtrr, pge, mca, cmov, pat, pse36, clflush, mmx, fxsr, sse, sse2, ss, syscall, nx, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, xtopology, cpuid, pni, pclmulqdq, ssse3, fma, cx16, pcid, sse4_1, sse4_2, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, pti, fsgsbase, bmi1, hle, avx2, smep, bmi2, erms, invpcid, rtm, avx512f, avx512dq, rdseed, adx, smap, clflushopt, avx512cd, avx512bw, avx512vl, xsaveopt, xsavec, xsaves, md_clear
Ecpus
1
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
512 MiB
Memory Amount Actual
512 MiB
GPU
GPU Count
0
GPU Memory Min
0 MiB
GPU Memory Total
0 MiB
GPUs
    STORAGE
    Storage Size
    4 GB
    Storages
    • 4 GB ssd (temp disk)
    NETWORK
    Inbound Traffic
    0 GB/month
    Outbound Traffic
    0 GB/month
    IPv4
    0

    CPU and System Topology

    Server Description

    An economical, burstable single-core virtual machine designed for entry-level workloads, basic microservices, and low-memory development environments.

    Burstable & BudgetGeneral Purpose

    Microsoft Azure B1ls is an entry-level, burstable virtual machine from the BS family, designed for low-memory and low-utilization workloads. Powered by a single-core Intel Xeon 8370C processor running at 2.8 GHz on the x86_64 architecture, this instance is equipped with 0.5 GB of RAM and 4 GB of local storage, with Premium Storage compatibility. Operating under Microsoft Hyper-V, it utilizes a burstable CPU allocation model to handle occasional performance spikes. Benchmark results reflect its budget-oriented design, showing a stress-ng CPU score of 1332.08 and a static web serving throughput of 1.27 GB/sec. The B1ls represents a highly cost-efficient option for workloads with low resource density, such as small development environments, basic microservices, and low-traffic web applications.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    0.108Score
    Precomputed compound score for Cache Intensive workloads. A weighted average (geometric mean) of benchmark scores compared to their medians: score = ∏ (x_i / m_i)^(w_i / Σw). The score of 1.0 represents a synthetic baseline server with the median performance of each component benchmark; 0.5 means roughly half the performance; and 2.0 means twice the performance of that reference profile. Component weights: 50% Redis RPS (pipeline=1, SET), 20% Redis RPS (pipeline=16, SET), 10% PassMark Memory Mark (composite), 10% Memory bandwidth (read, 16 MB ~ L3), 10% PassMark single-thread CPU. Rationale for component selection: In-memory key-value store workload, mixing direct Redis performance metrics with memory speed and latency benchmarks, and single-core CPU performance profiles.Partial coverage: missing component benchmark(s): PassMark Memory Mark (composite).
    Component Score Weight Impact Note
    Raw Reference Normalized Target Actual
    Redis RPS (pipeline=1, SET) 136,339 ops/sec 1,896,415 ops/sec 0.0719 50.00% 55.60% -76.90%
    Redis RPS (pipeline=16, SET) 886,474 ops/sec 11,539,523 ops/sec 0.0768 20.00% 22.20% -43.40%
    PassMark Memory Mark (composite) 0 2,411 — 10.00% 0.00% — invalid value: 0.0
    Memory bandwidth (read, 16 MB ~ L3) 27,216 MB/sec 107,368 MB/sec 0.253 10.00% 11.10% -14.10%
    PassMark single-thread CPU 1,600 Mops/s 2,363 Mops/s 0.677 10.00% 11.10% -4.24%

    Memory Bandwidth

    OpenSSL

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 1445
    Compression
    		 16832
    Encryption
    		 453
    Extended Instructions
    		 1399
    Floating Point Maths
    		 2954
    Integer Maths
    		 3537
    Physics
    		 197
    Prime Numbers
    		 11
    Single Threaded
    		 1600
    String Sorting
    		 2045

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 0
    Database Operations
    		 0
    Memory Latency
    		 0
    Memory Read Cached
    		 0
    Memory Read Uncached
    		 0
    Memory Write
    		 0

    Static Web Server

    Redis

    Alternatives

    Servers of the Same Family

    INSTANCEvCPUsMEMORYGPUs
    B1s 11 GiB0
    B1ms 12 GiB0
    B2s 24 GiB0
    B2ms 28 GiB0
    B4ms 416 GiB0
    B8ms 832 GiB0
    B12ms 1248 GiB0

    Similar Servers

    INSTANCEVENDORvCPUsMEMORYGPUs

    B1ls FAQs