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B1ms by Microsoft Azure

B1ms is a BS family [Memory Intensive] [Premium Storage capable] [Intel processor] 1 vCPU server offered by Microsoft Azure with 1 vCPUs, 2 GiB of memory and 4 GB of storage. The pricing starts at 0.0207 USD per hour.
1 vCPU
2 GiB Memory
4 GB Storage
Spare SCore
1225
(All-cores)
1225
(Single-core)

Specifications

Server Metadata

Vendor ID
azure
Server ID
Standard_B1ms
Name
B1ms
API Reference
Standard_B1ms
Description
BS family [Memory Intensive] [Premium Storage capable] [Intel processor] 1 vCPU
Family
BS
Hw Virt
Average Time To Start
27
Status
active
Observed At
2026-07-30T09:22:29.915783

Availability

REGION / IDSPOTONDEMAND
East US (US) / eastus
- 0.0207 USD/h
West US 2 (US) / westus2
- 0.0207 USD/h
West US 3 (US) / westus3
- 0.0207 USD/h
East US 2 (US) / eastus2
- 0.0208 USD/h
North Central US (US) / northcentralus
- 0.0208 USD/h
Sweden Central (SE) / swedencentral
- 0.0216 USD/h
Central India (IN) / centralindia
- 0.0224 USD/h
Jio India Central (IN) / jioindiacentral
- 0.0224 USD/h
Jio India West (IN) / jioindiawest
- 0.0224 USD/h
North Europe (IE) / northeurope
- 0.0227 USD/h
Mexico Central (ZA) / mexicocentral
- 0.0229 USD/h
Spain Central (ES) / spaincentral
- 0.0229 USD/h
Canada Central (CA) / canadacentral
- 0.023 USD/h
Canada East (CA) / canadaeast
- 0.0232 USD/h
UK West (GB) / ukwest
- 0.0235 USD/h
France Central (FR) / francecentral
- 0.0236 USD/h
UK South (GB) / uksouth
- 0.0236 USD/h
Indonesia Central (ID) / indonesiacentral
- 0.0238 USD/h
Malaysia West (MY) / malaysiawest
- 0.0238 USD/h
Austria East (AT) / austriaeast
- 0.024 USD/h
Belgium Central (BE) / belgiumcentral
- 0.024 USD/h
Germany West Central (DE) / germanywestcentral
- 0.024 USD/h
Israel Central (IL) / israelcentral
- 0.024 USD/h
Italy North (IT) / italynorth
- 0.024 USD/h
Poland Central (PL) / polandcentral
- 0.024 USD/h
West Europe (NL) / westeurope
- 0.024 USD/h
West US (US) / westus
- 0.0248 USD/h
Central US (US) / centralus
- 0.025 USD/h
South Central US (US) / southcentralus
- 0.025 USD/h
UAE North (AE) / uaenorth
- 0.025 USD/h
West Central US (US) / westcentralus
- 0.025 USD/h
Qatar Central (QA) / qatarcentral
- 0.0251 USD/h
Korea Central (KR) / koreacentral
- 0.026 USD/h
Korea South (KR) / koreasouth
- 0.026 USD/h
Australia Central (AU) / australiacentral
- 0.0264 USD/h
Australia Central 2 (AU) / australiacentral2
- 0.0264 USD/h
Australia East (AU) / australiaeast
- 0.0264 USD/h
Australia Southeast (AU) / australiasoutheast
- 0.0264 USD/h
Norway East (NO) / norwayeast
- 0.0264 USD/h
Southeast Asia (SG) / southeastasia
- 0.0264 USD/h
Switzerland North (CH) / switzerlandnorth
- 0.0264 USD/h
South Africa North (ZA) / southafricanorth
- 0.0271 USD/h
Japan East (JP) / japaneast
- 0.0272 USD/h
New Zealand North (NZ) / newzealandnorth
- 0.0277 USD/h
Chile Central (CL) / chilecentral
- 0.0291 USD/h
East Asia (HK) / eastasia
- 0.0292 USD/h
South India (IN) / southindia
- 0.0294 USD/h
Japan West (JP) / japanwest
- 0.03 USD/h
West India (IN) / westindia
- 0.03 USD/h
Germany North (DE) / germanynorth
- 0.0312 USD/h
UAE Central (AE) / uaecentral
- 0.0312 USD/h
Brazil South (BR) / brazilsouth
- 0.0336 USD/h
France South (FR) / francesouth
- 0.0338 USD/h
South Africa West (ZA) / southafricawest
- 0.0339 USD/h
Norway West (NO) / norwaywest
- 0.0343 USD/h
Switzerland West (CH) / switzerlandwest
- 0.0343 USD/h
Brazil Southeast (US) / brazilsoutheast
- 0.0437 USD/h

Processor

vCPUs
1
Hypervisor
Microsoft Hyper-V
CPU Allocation
Burstable
CPU Cores
1
CPU Speed
2.6 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8171M
CPU L1D Cache
32 KiB
CPU L1D Cache Total
32 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
32 KiB
CPU L2 Cache
256 KiB
CPU L2 Cache Total
256 KiB
CPU L3 Cache
50 MiB
CPU L3 Cache Total
50 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
2 GiB
Memory Amount Actual
2 GiB
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

    A budget-friendly burstable instance with a single vCPU and modest memory, designed for lightweight development and intermittent workloads.

    Burstable & BudgetGeneral Purpose

    Microsoft Azure B1ms is a burstable virtual machine from the BS family, utilizing the Microsoft Hyper-V hypervisor. It is configured with a single vCPU on an Intel Xeon 8171M processor running at 2.6 GHz, paired with 2.0 GB of RAM and 4 GB of local storage. Designed with a burstable CPU allocation model, this instance is engineered for low-intensity workloads that experience occasional spikes in activity. Benchmark results place its performance in the lower tier, with a Passmark CPU score of 1459.16 and a static web serving throughput of 1.47 GB/sec. The primary tradeoff is its limited processing power and memory capacity, making it highly cost-efficient for lightweight tasks but unsuitable for sustained high-performance computing. It is best utilized for development environments, small static web servers, and minor database operations.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    0.115Score
    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.
    Component Score Weight Impact
    Raw Reference Normalized Target Actual
    Redis RPS (pipeline=1, SET) 128,392 ops/sec 1,896,415 ops/sec 0.0677 50.00% 50.00% -74.00%
    Redis RPS (pipeline=16, SET) 826,189 ops/sec 11,539,523 ops/sec 0.0716 20.00% 20.00% -41.00%
    PassMark Memory Mark (composite) 919.8 2,411 0.382 10.00% 10.00% -9.17%
    Memory bandwidth (read, 16 MB ~ L3) 22,187 MB/sec 107,368 MB/sec 0.207 10.00% 10.00% -14.60%
    PassMark single-thread CPU 1,645 Mops/s 2,363 Mops/s 0.696 10.00% 10.00% -3.56%

    Memory Bandwidth

    Compression

    OpenSSL

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 1459
    Compression
    		 16911
    Encryption
    		 454
    Extended Instructions
    		 1402
    Floating Point Maths
    		 3025
    Integer Maths
    		 3543
    Physics
    		 197
    Prime Numbers
    		 11
    Single Threaded
    		 1645
    String Sorting
    		 2129

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 920
    Database Operations
    		 624
    Memory Latency
    		 53
    Memory Read Cached
    		 21154
    Memory Read Uncached
    		 9835
    Memory Write
    		 9164

    LLM Inference Speed for Prompt Processing

    LLM Inference Speed for Text Generation

    Static Web Server

    Redis

    Alternatives

    Servers of the Same Family

    INSTANCEvCPUsMEMORYGPUs
    B1ls 10.5 GiB0
    B1s 11 GiB0
    B2s 24 GiB0
    B2ms 28 GiB0
    B4ms 416 GiB0
    B8ms 832 GiB0
    B12ms 1248 GiB0

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    B1ms FAQs